Hammer Hunter Load Data, (See page 1, Post 8)

just_jon

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Update on 7 STW and 101

24” Wby factory
101 HH
3X win brass, .002 bump, .004 NT 1/8T crimp
Fed 215M
3.525”
Varget

75.3 - 3855 fps ES 6 SD 3 Grp .41”.
75.6 - 3856 fps ES 7 SD 3 Grp .33”. Final load.
Minor primer flattening on 75.6. Total of 10 rounds fired with ES of 7. Seems like a good node to be in.
 

stevejfarms

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You could likely get that velocity up quite a bit IMO. My 25" 7WSM will shoot the 143HH @ 3,200 ft/sec with RE23 and @ 3,350 with RE26.
I don’t have any RE 23, I think I can I can push quite a bit more with 4831. I do have RE26 though. Not a lot of time, it’s my cousins rifle and he’s leaving on a hunt in 2 days.
 

SamuelBerryhill308

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Hammer loads I have so far with best accuracy
300wsm browning abolt 2 with 22inch barrel 152 hammer hunters 64 grains n550 norma brass wlrm primers.c.b.t.o 2.290..3244 fps shoots .363 at 100 yards.
Remington 700 sps tatical with 20 inch barrel 152 shock hammers lapua brass f210m primers. C.b.t.o 2.317 45.5 grains varget 2713 fps shoots .327 at 100 yards
 

bamban

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Took the 30-06 to 500 yards to do a short ladder, 55-62 @ 1 grain increment. 61 started to see faint ejector swipe, 62 is hard bolt lift. I did not take the LabRadar, have terminal velocity reading from Shotmarker, just back calculate muzzle.

137HH
N540 powder
CCI 250

Disregard the SR3 target. We used it to zero our 300WM hunting rifles, and took cold bore at 500. Afterwards I ran the short ladder.
View attachment 310704View attachment 310705View attachment 310706View attachment 310707View attachment 310708View attachment 310709View attachment 310710View attachment 310711


Any suggestion as to which load to start development? 58.5 would be my vote.

Back calculating based on the retained velocity at 500, my guess the muzzle velocity of 58.5 would be in the neighborhood of 3350-3370
Today took the 06 to the 200 yard range to see how the 58.5 velocity at the muzzle would be. Raining somewhat. Thr mil adjustments had me confused, my first mil/mil scope. I was adjusting like MOA click at firs

Not too bad, Average of 10 shots is reflected.
Screenshot_20211127-143209_Shooter.jpg


Precision is acceptable. Right target.1st shot at 2 by the white, 2nd shot at 12 still above the aiming point. 3rd shot on thr aiming target at 10. 4th shot at 2 on the aiming target, 5th shot on the aiming target at 5. 6th shot center point. Cooled down for 30 minutes, 7th shot at 5 below thr 6th shot
20211127_092114.jpg


Shot rounds at 100 to get it close.
Screenshot_20211127-144214_Calculator.jpg


Note: Disregard the 2950 it is at the avearge of the 3 shots with the 280AI when I changed the 210Ms with BR2s. Target on the L
 
Last edited:

JTH

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I’ve been working on load development for a new 6.5 Sherman Short that I had built by Ryan Pierce (Piercision), who did an awesome job. It’s got a 24” Proof research barrel, 1 in 7.5 inch twist, and I’m running it suppressed. Running ADG brass from Sherman. Primers are CCI 200. I don’t have a Lee FCD for this round yet, I suspect when it arrives I’ll see the groups tighten up a little as I’ve experienced with other Hammer loads.

Here’s what I’ve got so far:

H4831SC seated at 2.270 cbto

58.0 - 3085
58.5 - 3092
59.0 - 3132
59.5 - 3142
60.0 - 3169
60.5 - 3197
61.0 - 3232
61.5 - failed to record on LabRadar
62.0 - 3273, Pressure (ejector mark)

Also tried RL23 on the advice of Lance Kenyon. These were seated at 2.280 cbto to start.

57.0 - 3137
57.5 - 3129
58.0 - 3144
58.5 - 3205
59.0 - 3228
59.5 -3207 (this one was actually seated a little deeper, 2.275, hence less pressure.
60.0 -3259 No pressure signs, but stopped here.

I was seeing very consistent grouping with the RL23. The rounds with 58.5, 59.0 and 59.5 printed the cloverleaf lower left, this was at 200 yards. The 60 grain charge produced the flier:

F80549DE-7F25-45E1-98FF-F6CEA2CE95AA.jpeg


Continued load development today. Its a little windy, 18-24 mph today at almost full value so I moved in to 100 yards to minimize the wind effect.

After trying different seating depths and powder charges, (it’s evident the barrel is speeding up, at about 70 rounds through it as of today) settled on 58.7 grains of RL23, seated at 2.270 cbto. This produced an average of 3254 FPS with an ES of 31 and SD of 16. group about 1/2 MOA, photo below:

6FEC1A92-4EF6-40B5-9C00-5823555ECF55.jpeg
 

Dmagna

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Just started with my 6.5 prc with 123 Absolute hunter. Done a considerable amount of reloading, I havnt seen velocity like this before. Not saying this is out of the ordinary so far it’s just preliminary I am getting 3460 so far using N560.
 

Hard rock

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Just started with my 6.5 prc with 123 Absolute hunter. Done a considerable amount of reloading, I havnt seen velocity like this before. Not saying this is out of the ordinary so far it’s just preliminary I am getting 3460 so far using N560.
Good too hear I’m hoping for 3500 plus with N560 out of my 26 in prc proof my current powder is n165 and vel is at 3450 plus getting heavily compressed just haven’t had time being hunting season
 

Dmagna

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Good too hear I’m hoping for 3500 plus with N560 out of my 26 in prc proof my current powder is n165 and vel is at 3450 plus getting heavily compressed just haven’t had time being hunting season
I got to 3500 but I don’t think it was safe. Mine is also 26” but a carbon six.
 

Hard rock

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What pressure signs mine is a proof with a Curtis axiom 3 lug 8 twist I’m up too 3450 plus with 63.5 grs of n165 cci250 mag primers no pressure signs
50 fps plus seems too be the norm with n560 versus n165 on data I’ve seen on other cartridges but the n165 is easier on the throat if that matters
 
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