Introducing the Absolute Hammer

SeboCreek

Well-Known Member
Joined
Apr 24, 2019
Messages
119
Location
Hill Country Texas
Just finished another short shoot with 123 gr AH in a 6.5 Weatherby With Rel 26. Went from 70 up to 72 grains. Velocities ran from 3373 up to 3515. Think getting near the top end, but 3515 is pretty fast. Still shooting less than .5 MOA. On the other hand shot the 155 gr AH in a 7 mm STW with Rel 22. This shot slower than similar loads with 160 gr Sledge Hammers. I will note no stability problems in the 9 twist that I ran into in a 280 AI with 9 twist. Tune in next week for more. 7 STW did still have all three holes cutting.
 

Fotis

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Joined
Jul 25, 2001
Messages
1,840
Location
CHEYENNE, WY
I will... Antelope tomorrow next week Moose, following week Hunting With Heroes (taking 18 disabled vets antelope hunting on donated Wyoming tags) Then deer then elk then deer again.

This month is gonna be BUSY!!!!

BTW If any disabled vet (50% or more with a VA letter) is interested in a free WY antelope hunt let me know please.
We pay for everything sans travel to here and back.

 

Varmint Hunter

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Joined
Dec 26, 2001
Messages
3,382
Location
Long Island, New York
BTW If any disabled vet (50% or more with a VA letter) is interested in a free WY antelope hunt let me know please.
We pay for everything sans travel to here and back.
I am not a veteran but just want to say that what you're doing for our disabled vets is FANTASTIC!

Thanks to all who serve,
 

speedengineer

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Joined
Jan 31, 2020
Messages
54
Location
SE Michigan
I tried to simulate these new bullets in QuickLoad to see what it suggests. (Full disclosure, I am not a QL expert by any means, and it's totally possible I am missing something). I assumed that the increase in speed would be due to reduced engraving pressure of the bullet entering the rifling. QL suggests ~6500psi for a standard copper solid. So, I compared a simulation with 6500psi for the baseline, and a wild guess of 1000psi for the Absolute Hunter. No idea on the validity of that number, but I wanted to see what effect this magnitude of a change has on predicted muzzle velocity. Simulation is for a 6.5 PRC, limiting to 60k psi as that is more representative of bullet velocities I observe in real life.

Simulating "traditional HH" style bullet with 6500psi engraving pressure:
Code:
119 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-26 *C               92.7     61.3     3.97    3276   100.0    60000   12101   1.230  ! Near Maximum !
Alliant Reloder-25 *C              101.5     62.1     4.02    3266   100.0    60000   11829   1.213  ! Near Maximum !
PB Clermont PCL 517                 98.8     64.8     4.20    3265    99.5    60000   12520   1.212  ! Near Maximum !
SNPE Vectan SP 12                   98.6     64.7     4.19    3264    99.5    60000   12494   1.212  ! Near Maximum !
ReloadSwiss RS 70 *C                91.4     59.8     3.88    3259   100.0    60000   11952   1.205  ! Near Maximum !
Norma MRP *C                        93.8     60.2     3.90    3258   100.0    60000   12304   1.224  ! Near Maximum !
Simulating "Absolute Hunter" style bullet using 1000psi engraving pressure:
Code:
97 loads produced a Loading Ratio below user-defined minimum of 80%. These powders have been skipped.
Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-26 *C               97.9     64.7     4.20    3333   100.0    60000   12781   1.215  ! Near Maximum !
Vihtavuori N560 *C                 100.5     63.2     4.09    3323    99.0    60000   13352   1.200  ! Near Maximum !
Norma MRP *C                        98.8     63.4     4.11    3320   100.0    60000   12924   1.207  ! Near Maximum !
Accurate MAGPRO                    100.9     65.9     4.27    3314    98.1    60000   13462   1.208  ! Near Maximum !
IMR 7828 SSC                        99.3     62.7     4.07    3312    99.3    60000   12928   1.190  ! Near Maximum !
ReloadSwiss RS 70 *C                95.8     62.8     4.07    3312   100.0    60000   12513   1.192  ! Near Maximum !
ADI AR 2213                        100.3     62.3     4.04    3298    99.3    60000   12810   1.187  ! Near Maximum !

I'm seeing 50, maybe 60 fps advantage for the AH after optimizing for powder charge to the same peak pressure. Are there other reasons besides engraving pressure that would cause this bullet to achieve higher velocities? I don't see any setting for the amount of friction of the bullet after it's moving down the barrel. Would this even be a contributing factor, and if so, do any QL experts know if this setting is user adjustable? It doesn't appear to be. Any other thoughts?
 
Last edited:

JMW67

Well-Known Member
Joined
Dec 6, 2012
Messages
1,077
Location
TEXAS
I will... Antelope tomorrow next week Moose, following week Hunting With Heroes (taking 18 disabled vets antelope hunting on donated Wyoming tags) Then deer then elk then deer again.

This month is gonna be BUSY!!!!

BTW If any disabled vet (50% or more with a VA letter) is interested in a free WY antelope hunt let me know please.
We pay for everything sans travel to here and back.

I would like to thank you also I am a vet but my only disabilities are self induced or sits on top of my shoulders what you and others are doing for them is fabulous keep up the good work
 

dok7mm

Well-Known Member
Joined
Apr 13, 2015
Messages
1,798
Location
west texas
To close this out for anyone else looking for 65SS data. I Loaded four more of R23. 62 would be compressed as best I can tell. Each of these gave a slight shiny ejector but no stiff bolt lift. I felt ever so slight resistance at 60.5 but that was the only one.

I'm going to check out the velocity node at 59 - 59.5 and somewhere between 60-60.5 just see how it deals with pressure longer term and accuracy.

60 - 3377 (was 3370 an hour ago)
60.5 - 3390
61 - 3427
61.5 - 3442
Thank you for that info on 6.5SS. I may have missed your OAL, but I'll wait til you find your final data.
 

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