Please HELP!! Low pressure???

Buster Hemlock

Well-Known Member
Joined
Feb 26, 2019
Messages
212
Location
NC
So to make quickload track really well you need to have a good case capacity instead of the generic one that it inputs but using the generic one will still give you an idea. Also you need to adjust powder burn rate as it varies from lot to lot but again quick load will still give you a decent idea of what you should be seeing. Only thing I would need that I don't see on your photos or in your messages is a COAL for your cartridge instead of CBTO and I can see what it spits out for whatever powders you want, probably H1000, H4831 and H4350. Let me know. Also quick load is just a guess until you start refining some of the parameters to really get it to track well.
 

Colin78

Well-Known Member
Joined
Jan 25, 2018
Messages
224
Location
Texas Hill Country
So to make quickload track really well you need to have a good case capacity instead of the generic one that it inputs but using the generic one will still give you an idea. Also you need to adjust powder burn rate as it varies from lot to lot but again quick load will still give you a decent idea of what you should be seeing. Only thing I would need that I don't see on your photos or in your messages is a COAL for your cartridge instead of CBTO and I can see what it spits out for whatever powders you want, probably H1000, H4831 and H4350. Let me know. Also quick load is just a guess until you start refining some of the parameters to really get it to track well.

The COAL is 2.966” and yes if you don’t mind running it for all 3 of those powders that would be awesome.

Attached is my results from today with more powder and the Hornady brass that gave me .0025 neck tension. I did not have any high pressure signs at all with these loads so I plan to keep going up and see what I come up with.

Not sure how this plays into everything but the loaded neck diameter of the ADG brass is .291. The loaded neck diameter of the Hornady brass is .293 so a full 2 thousandths fatter. The dummy round I used to built the reamer was with the Hornady brass. Does that mean there would be a big gap when using ADG brass?
 

Attachments

Buster Hemlock

Well-Known Member
Joined
Feb 26, 2019
Messages
212
Location
NC
This is just predicted data based off of a computer program and with different components and different rifles you may have different results, so work up. Now that the obligatory disclaimer has been said, here is the Quickload data for those three powders, 22" barrel, COAL of 2.966" and the 129 ABLR.

H-1000:

Cartridge : 6.5 mm RSAUM
Bullet : .264, 129, Nosler AccuBond LR 58943 G7
Useable Case Capaci: 66.771 grain H2O = 4.335 cm³
Cartridge O.A.L. L6: 2.966 inch = 75.34 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon H1000 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 90 54.81 2541 1849 35100 12552 90.7 1.438
-09.0 91 55.42 2573 1896 36268 12747 91.4 1.420
-08.0 92 56.03 2605 1944 37478 12938 92.1 1.398
-07.0 93 56.64 2637 1993 38734 13125 92.8 1.376
-06.0 94 57.25 2670 2042 40034 13306 93.5 1.354
-05.0 95 57.86 2703 2092 41381 13483 94.1 1.332
-04.0 96 58.46 2735 2143 42779 13655 94.7 1.310
-03.0 97 59.07 2768 2195 44228 13821 95.2 1.290
-02.0 98 59.68 2801 2248 45731 13981 95.8 1.269
-01.0 99 60.29 2834 2301 47291 14136 96.3 1.248
+00.0 100 60.90 2867 2355 48912 14284 96.8 1.228
+01.0 101 61.51 2900 2409 50595 14425 97.2 1.209
+02.0 102 62.12 2933 2465 52340 14559 97.6 1.189
+03.0 103 62.73 2967 2521 54157 14685 98.0 1.170
+04.0 104 63.34 3000 2577 56044 14805 98.4 1.151 ! Near Maximum !
+05.0 105 63.95 3033 2635 58006 14917 98.7 1.133 ! Near Maximum !

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 100 60.90 3041 2649 59580 14236 100.0 1.125 ! Near Maximum !
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 60.90 2641 1998 39715 13328 87.9 1.357

H4831:

Cartridge : 6.5 mm RSAUM
Bullet : .264, 129, Nosler AccuBond LR 58943 G7
Useable Case Capaci: 66.771 grain H2O = 4.335 cm³
Cartridge O.A.L. L6: 2.966 inch = 75.34 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon H4831 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 86 51.14 2572 1896 38223 12152 91.6 1.395
-09.0 86 51.71 2602 1939 39424 12323 92.2 1.375
-08.0 87 52.27 2631 1983 40661 12490 92.7 1.355
-07.0 88 52.84 2660 2027 41941 12655 93.3 1.335
-06.0 89 53.41 2690 2072 43254 12817 93.8 1.316
-05.0 90 53.98 2719 2117 44602 12976 94.3 1.296
-04.0 91 54.55 2748 2163 45987 13132 94.7 1.277
-03.0 92 55.12 2778 2210 47411 13284 95.2 1.258
-02.0 93 55.68 2807 2257 48879 13433 95.6 1.240
-01.0 94 56.25 2836 2305 50393 13578 96.0 1.222
+00.0 95 56.82 2866 2353 51954 13719 96.4 1.205
+01.0 96 57.39 2895 2401 53565 13856 96.8 1.187
+02.0 97 57.96 2925 2450 55225 13989 97.2 1.170
+03.0 98 58.52 2954 2500 56939 14117 97.5 1.154 ! Near Maximum !
+04.0 99 59.09 2984 2550 58707 14241 97.8 1.137 ! Near Maximum !
+05.0 100 59.66 3013 2600 60531 14361 98.1 1.121 ! Near Maximum !

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 95 56.82 3012 2599 61516 13803 99.7 1.115 ! Near Maximum !
Data for burning rate decreased by 10% relative to nominal value:
-Ba 95 56.82 2678 2055 42611 12983 89.3 1.319

H4350:

Cartridge : 6.5 mm RSAUM
Bullet : .264, 129, Nosler AccuBond LR 58943 G7
Useable Case Capaci: 66.771 grain H2O = 4.335 cm³
Cartridge O.A.L. L6: 2.966 inch = 75.34 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon H4350 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 81 48.77 2645 2004 42600 11992 96.9 1.330
-09.0 82 49.31 2672 2045 43821 12125 97.3 1.312
-08.0 83 49.85 2699 2086 45073 12254 97.6 1.294
-07.0 84 50.40 2725 2127 46357 12379 97.9 1.276
-06.0 85 50.94 2752 2169 47675 12502 98.2 1.259
-05.0 86 51.48 2778 2211 49026 12620 98.4 1.243
-04.0 86 52.02 2805 2253 50413 12735 98.7 1.226
-03.0 87 52.56 2831 2295 51836 12846 98.9 1.210
-02.0 88 53.11 2857 2338 53295 12953 99.1 1.194
-01.0 89 53.65 2883 2381 54793 13056 99.3 1.178
+00.0 90 54.19 2909 2424 56330 13154 99.4 1.163 ! Near Maximum !
+01.0 91 54.73 2935 2468 57907 13249 99.6 1.148 ! Near Maximum !
+02.0 92 55.27 2961 2511 59525 13339 99.7 1.133 ! Near Maximum !
+03.0 93 55.82 2987 2555 61186 13425 99.8 1.119 ! Near Maximum !
+04.0 94 56.36 3012 2599 62891 13506 99.9 1.105 ! Near Maximum !
+05.0 95 56.90 3038 2643 64641 13583 99.9 1.091 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 90 54.19 3019 2611 65265 12820 100.0 1.087 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 90 54.19 2756 2176 47391 12951 95.3 1.262

Let me know if you need help deciphering this as the formatting doesn't all carry overall that well and if you haven't used Quick Load it may be unclear or some of the abbreviations may be unfamiliar.
 

Colin78

Well-Known Member
Joined
Jan 25, 2018
Messages
224
Location
Texas Hill Country
This is just predicted data based off of a computer program and with different components and different rifles you may have different results, so work up. Now that the obligatory disclaimer has been said, here is the Quickload data for those three powders, 22" barrel, COAL of 2.966" and the 129 ABLR.

H-1000:

Cartridge : 6.5 mm RSAUM
Bullet : .264, 129, Nosler AccuBond LR 58943 G7
Useable Case Capaci: 66.771 grain H2O = 4.335 cm³
Cartridge O.A.L. L6: 2.966 inch = 75.34 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon H1000 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 90 54.81 2541 1849 35100 12552 90.7 1.438
-09.0 91 55.42 2573 1896 36268 12747 91.4 1.420
-08.0 92 56.03 2605 1944 37478 12938 92.1 1.398
-07.0 93 56.64 2637 1993 38734 13125 92.8 1.376
-06.0 94 57.25 2670 2042 40034 13306 93.5 1.354
-05.0 95 57.86 2703 2092 41381 13483 94.1 1.332
-04.0 96 58.46 2735 2143 42779 13655 94.7 1.310
-03.0 97 59.07 2768 2195 44228 13821 95.2 1.290
-02.0 98 59.68 2801 2248 45731 13981 95.8 1.269
-01.0 99 60.29 2834 2301 47291 14136 96.3 1.248
+00.0 100 60.90 2867 2355 48912 14284 96.8 1.228
+01.0 101 61.51 2900 2409 50595 14425 97.2 1.209
+02.0 102 62.12 2933 2465 52340 14559 97.6 1.189
+03.0 103 62.73 2967 2521 54157 14685 98.0 1.170
+04.0 104 63.34 3000 2577 56044 14805 98.4 1.151 ! Near Maximum !
+05.0 105 63.95 3033 2635 58006 14917 98.7 1.133 ! Near Maximum !

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 100 60.90 3041 2649 59580 14236 100.0 1.125 ! Near Maximum !
Data for burning rate decreased by 10% relative to nominal value:
-Ba 100 60.90 2641 1998 39715 13328 87.9 1.357

H4831:

Cartridge : 6.5 mm RSAUM
Bullet : .264, 129, Nosler AccuBond LR 58943 G7
Useable Case Capaci: 66.771 grain H2O = 4.335 cm³
Cartridge O.A.L. L6: 2.966 inch = 75.34 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon H4831 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 86 51.14 2572 1896 38223 12152 91.6 1.395
-09.0 86 51.71 2602 1939 39424 12323 92.2 1.375
-08.0 87 52.27 2631 1983 40661 12490 92.7 1.355
-07.0 88 52.84 2660 2027 41941 12655 93.3 1.335
-06.0 89 53.41 2690 2072 43254 12817 93.8 1.316
-05.0 90 53.98 2719 2117 44602 12976 94.3 1.296
-04.0 91 54.55 2748 2163 45987 13132 94.7 1.277
-03.0 92 55.12 2778 2210 47411 13284 95.2 1.258
-02.0 93 55.68 2807 2257 48879 13433 95.6 1.240
-01.0 94 56.25 2836 2305 50393 13578 96.0 1.222
+00.0 95 56.82 2866 2353 51954 13719 96.4 1.205
+01.0 96 57.39 2895 2401 53565 13856 96.8 1.187
+02.0 97 57.96 2925 2450 55225 13989 97.2 1.170
+03.0 98 58.52 2954 2500 56939 14117 97.5 1.154 ! Near Maximum !
+04.0 99 59.09 2984 2550 58707 14241 97.8 1.137 ! Near Maximum !
+05.0 100 59.66 3013 2600 60531 14361 98.1 1.121 ! Near Maximum !

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 95 56.82 3012 2599 61516 13803 99.7 1.115 ! Near Maximum !
Data for burning rate decreased by 10% relative to nominal value:
-Ba 95 56.82 2678 2055 42611 12983 89.3 1.319

H4350:

Cartridge : 6.5 mm RSAUM
Bullet : .264, 129, Nosler AccuBond LR 58943 G7
Useable Case Capaci: 66.771 grain H2O = 4.335 cm³
Cartridge O.A.L. L6: 2.966 inch = 75.34 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon H4350 *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-10.0 81 48.77 2645 2004 42600 11992 96.9 1.330
-09.0 82 49.31 2672 2045 43821 12125 97.3 1.312
-08.0 83 49.85 2699 2086 45073 12254 97.6 1.294
-07.0 84 50.40 2725 2127 46357 12379 97.9 1.276
-06.0 85 50.94 2752 2169 47675 12502 98.2 1.259
-05.0 86 51.48 2778 2211 49026 12620 98.4 1.243
-04.0 86 52.02 2805 2253 50413 12735 98.7 1.226
-03.0 87 52.56 2831 2295 51836 12846 98.9 1.210
-02.0 88 53.11 2857 2338 53295 12953 99.1 1.194
-01.0 89 53.65 2883 2381 54793 13056 99.3 1.178
+00.0 90 54.19 2909 2424 56330 13154 99.4 1.163 ! Near Maximum !
+01.0 91 54.73 2935 2468 57907 13249 99.6 1.148 ! Near Maximum !
+02.0 92 55.27 2961 2511 59525 13339 99.7 1.133 ! Near Maximum !
+03.0 93 55.82 2987 2555 61186 13425 99.8 1.119 ! Near Maximum !
+04.0 94 56.36 3012 2599 62891 13506 99.9 1.105 ! Near Maximum !
+05.0 95 56.90 3038 2643 64641 13583 99.9 1.091 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 90 54.19 3019 2611 65265 12820 100.0 1.087 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 90 54.19 2756 2176 47391 12951 95.3 1.262

Thank you very much. This is some wonderful info.

Looks like I’m getting a tad bit more velocity with H1000 and a tad bit less with H4831 than this estimated. I’m not seeing any over pressure signs so I’m going to keep increasing a little but going to go up in .02 grain increments to be safe.

Guys you don’t know how much I appreciate all the info and help you all continue to provide. Great group of guys on here.
 

Buster Hemlock

Well-Known Member
Joined
Feb 26, 2019
Messages
212
Location
NC
Glad to help. Quickload is just a guess. Your H-1000 loads could be faster due to having less case capacity, a faster lot of powder or quite a few other different things that Quickload doesn't calculate for such as there isn't any data or input section for primers, you can adjust shot start pressures but really doing that is just a guess. You could also have a faster barrel as the algorithm it uses to adjust data on barrel length is an algorithm and won't be accurate for every setup as they are all unique. For your H4831 load you could have more case capacity or a slower lot of powder. It's a good resource/tool for someone loading wildcats or thinking of a new cartridge that doesn't have established load data and is definitely fun to play with.
 

Buster Hemlock

Well-Known Member
Joined
Feb 26, 2019
Messages
212
Location
NC
Thank you very much. This is some wonderful info.

Looks like I’m getting a tad bit more velocity with H1000 and a tad bit less with H4831 than this estimated. I’m not seeing any over pressure signs so I’m going to keep increasing a little but going to go up in .02 grain increments to be safe.

Guys you don’t know how much I appreciate all the info and help you all continue to provide. Great group of guys on here.
If it were me I'd continue to work up in .3 gr. increments monitoring for pressure signs, .02 gr. increments will take quite a while and use up components and barrel life unnecessarily. Monitor for pressure indicators on the brass and an increase in bolt lift and then just pull down any rounds above this and you will be fine.
 

Roninco

Member
LRH Team Member
Joined
May 7, 2020
Messages
24
Location
Colorado
The Hornady brass will be relatively softer than ADG brass. Fire forming ADG brass may require a bit more pressure than your Hornady workup.
 

orch

Well-Known Member
Joined
Jul 27, 2011
Messages
197
Location
manitoba, canada
I don’t remember exactly what it’s throated for, gotta call my smith Monday and discuss all this with him. I know he was very curious as to what I could do with it. I will say this the 129 ablr's are .02 off the lands and all of the boat tail is in past the case neck but that is all. So I am getting full grip on the bullet.

What powder would you recommend? Is H4350 faster than H4831? Would that be the next to go? I only use hodgdon extreme powders.
Yah I’d try h4350 and see what that does...

Couple of other questions that crossed my mind:
What are you using for a scale? Doubt that it could be your scale is reading higher than reality but it’s worth checking vrs another scale to verify.

What make of barrel did you use for the build? Perhaps it’s got a slightly oversized bore? Less friction/less pressure...

What is your headspace like? If you are a ways off on your headspace with virgin brass maybe that could be part of the culprit... if you were forming the brass from 7mm saum or 300 saum I’d say you could leave enough of a false shoulder at the neck/shoulder junction, just enough that you feel a sligh crush on closing the bolt, getting you a good seal on the chamber...

If you are 0.020” off the lands I’d say that’s pretty much where I load mine to so I wouldn’t say you are jumping them too far.

Have you tried with the Hornady brass yet?

Orch
 

Scott E Ames

Well-Known Member
LRH Team Member
Joined
Dec 25, 2012
Messages
213
"Colin78, post: 1952868, member: 104391"]
Another question. The ADG brass that has the dents in the shoulder....can I reload it and shoot them, and will the dent pop back out or is that brass trashed?

Make sure when you re-seat the bullets on the next rounds that there are no splits in the necks around the dents.
 

375fan

Well-Known Member
Joined
May 3, 2010
Messages
336
Location
Central Ohio
Have/did you anneal the ADG brass? That would be first thing I would do to the ADG brass.
You stated you had reamer made off Hornady brass with outside neck diameter of .293 (I'm assuming that's with a bullet seated) now you"re using ADG with diameter of .291. That is an extra .002 that your case mouth has to stretch to seal against chamber neck wall.
I have 2 6.5saum that I load for but haven't loaded anything lighter than 140gr. so can't help with powder charge suggestions.
 

Trending threads

Recent Posts

Top