Technically GM205MARIt’s almost the same as the GM205m. The cups are set back a little further from the anvil to prevent slam fires in gas guns. That’s what the AR at the end stands for. They work great.
Technically GM205MARIt’s almost the same as the GM205m. The cups are set back a little further from the anvil to prevent slam fires in gas guns. That’s what the AR at the end stands for. They work great.
Technically GM205MAR
I only have one. It’s the M1A in manbun. Fun and accurate rifle.Thank you sir.
I'm not a gas gun guy, so don't know much about them.
Thanks for educating me!
powder & weight | % fill | Velocity | comments |
N550 | |||
84.00 | 87% | 3648 | |
84.98 | 88% | 3693 | slight clicker |
86.02 | 89% | 3742 | slight Hrd/Blt/Lft (HBL), s. clicker |
87.02 | 90% | 3801 | HBL, Ectr/Mrk (E/M), blwn prmr |
H4350 | |||
82.00 | 87% | 3460 | |
82.98 | 88% | 3513 | |
84.00 | 89% | 3582 | |
85.00 | 90% | 3623 | |
85.98 | 91% | 3680 | E/M, slight HBL |
87.00 | 92% | 3746 | HBL!, clicker, stuck case, E/M |
Staball 6.5 | |||
81.00 | 82% | 3367 | Staball 6.5 printed a tight overall group |
82.00 | 83% | 3372 | |
83.00 | 84% | no vel. meas. | |
84.00 | 85% | 3475 | |
85.00 | 86% | no vel. meas. | |
86.00 | 87% | 3572 | |
87.00 | 88% | 3612 | |
88.00 | 89% | 3682 | slight clicker |
88.98 | 90% | 3728 | hard clicker, hard extract. |
N555 | |||
80.00 | 91% | ||
81.02 | 92% | 3336 | |
81.98 | 93% | 3397 | |
83.00 | 94% | no vel. meas. | |
84.00 | 95% | 3484 | |
85.00 | 96% | no vel. meas. | |
86.00 | 97% | 3566 | |
87.00 | 99% | 3594 | 87.00 & 88.02 printed a tight group |
88.02 | 100% | 3637 | slight clicker. Start vibrate powder |
89.02 | 101% | 3642 | clicker, v. slight ejector mark. |
H4831SC | |||
82.00 | 88% | 3151 | note: mostly going in 2gn steps |
84.00 | 90% | 3258 | |
85.98 | 92% | 3373 | |
88.00 | 95% | 3451 | |
89.98 | 97% | 3566 | |
90.98 | 98% | 3622 | |
91.00 | 98% | 3611 | start using drop tube |
91.98 | 99% | no vel. meas. | |
93.00 | 100% | 3689 | |
94.00 | 101% | 3720 | clicker |
95.00 | 102% | 3767 | powder compressed. clicker, hard extract |
N560 | |||
86.00 | 89% | 3274 | note: mostly going in 2gn steps |
88.00 | 91% | 3375 | |
90.02 | 93% | 3494 | |
91.98 | 95% | 3596 | |
94.02 | 97% | 3711 | start vibrate powder to settle |
95.02 | 98% | 3752 | start slight compression, no pressure, but see next line |
95.00 | 98% | 3773 | 1st crimped loads. clicker, hard to extract |
96.04 | 99% | 1st crimped loads. hrd clckr, hrd to extract | |
I7828SC | |||
87.02 | 91% | 3399 | |
91.00 | 95% | 3656 | slight clicker |
92.00 | 96% | 3677 | slight clicker |
93.02 | 97% | 3752 | hard clicker, HBL, hard extract |
N565 | |||
83.00 | 91% | 3176 | note: big steps |
85.98 | 94% | 3272 | |
89.02 | 98% | 3392 | |
91.00 | 100% | no vel. meas. | start drop tube. slight clicker |
92.00 | 101% | 3515 | clicker |
Magpro | |||
85.00 | 87% | 3121 | note: big steps |
89.98 | 92% | 3310 | |
92.00 | 94% | 3361 | |
92.98 | 95% | 3413 | |
93.98 | 96% | 3419 | |
94.98 | 97% | 3451 | start using drop tube |
96.00 | 98% | 3499 | slight clicker |
98.00 | 100% | 3600 | |
99.00 | 101% | 3608 | slight clicker |
99.98 | 102% | 3638 | start vibrate powder, clicker!, hard extract |
H1000 | |||
86.98 | 94% | 3214 | note: big steps |
90.02 | 97% | 3414 | |
91.98 | 100% | 3478 | |
94.06 | 102% | 3506 | slight clicker. Start compressed powder |
95.00 | 103% | 3612 | clicker. |
96.00 | 104% | no vel. meas. | clicker. 95.00 & 96.00 printed a tight group |
Now THAT is a test!Here's a tranche of Absolute Hammer load data. Particulars are:
Kimber Montana in 30 Nosler
Benchmark 26" 8T barrel
Absolute Hammer 151gn
Federal 215 primer
ADG brass; virgin and 1x fired (annealed after each firing)
some loads were 1/8T crimped, some were not crimped
This rifle/bullet combination seems to have an accuracy node at about 3600fps
powder & weight % fill Velocity comments N550 84.00 87% 3648 84.98 88% 3693 slight clicker 86.02 89% 3742 slight Hrd/Blt/Lft (HBL), s. clicker 87.02 90% 3801 HBL, Ectr/Mrk (E/M), blwn prmr H4350 82.00 87% 3460 82.98 88% 3513 84.00 89% 3582 85.00 90% 3623 85.98 91% 3680 E/M, slight HBL 87.00 92% 3746 HBL!, clicker, stuck case, E/M Staball 6.5 81.00 82% 3367 Staball 6.5 printed a tight overall group 82.00 83% 3372 83.00 84% no vel. meas. 84.00 85% 3475 85.00 86% no vel. meas. 86.00 87% 3572 87.00 88% 3612 88.00 89% 3682 slight clicker 88.98 90% 3728 hard clicker, hard extract. N555 80.00 91% 81.02 92% 3336 81.98 93% 3397 83.00 94% no vel. meas. 84.00 95% 3484 85.00 96% no vel. meas. 86.00 97% 3566 87.00 99% 3594 87.00 & 88.02 printed a tight group 88.02 100% 3637 slight clicker. Start vibrate powder 89.02 101% 3642 clicker, v. slight ejector mark. H4831SC 82.00 88% 3151 note: mostly going in 2gn steps 84.00 90% 3258 85.98 92% 3373 88.00 95% 3451 89.98 97% 3566 90.98 98% 3622 91.00 98% 3611 start using drop tube 91.98 99% no vel. meas. 93.00 100% 3689 94.00 101% 3720 clicker 95.00 102% 3767 powder compressed. clicker, hard extract N560 86.00 89% 3274 note: mostly going in 2gn steps 88.00 91% 3375 90.02 93% 3494 91.98 95% 3596 94.02 97% 3711 start vibrate powder to settle 95.02 98% 3752 start slight compression, no pressure, but see next line 95.00 98% 3773 1st crimped loads. clicker, hard to extract 96.04 99% 1st crimped loads. hrd clckr, hrd to extract I7828SC 87.02 91% 3399 91.00 95% 3656 slight clicker 92.00 96% 3677 slight clicker 93.02 97% 3752 hard clicker, HBL, hard extract N565 83.00 91% 3176 note: big steps 85.98 94% 3272 89.02 98% 3392 91.00 100% no vel. meas. start drop tube. slight clicker 92.00 101% 3515 clicker Magpro 85.00 87% 3121 note: big steps 89.98 92% 3310 92.00 94% 3361 92.98 95% 3413 93.98 96% 3419 94.98 97% 3451 start using drop tube 96.00 98% 3499 slight clicker 98.00 100% 3600 99.00 101% 3608 slight clicker 99.98 102% 3638 start vibrate powder, clicker!, hard extract H1000 86.98 94% 3214 note: big steps 90.02 97% 3414 91.98 100% 3478 94.06 102% 3506 slight clicker. Start compressed powder 95.00 103% 3612 clicker. 96.00 104% no vel. meas. clicker. 95.00 & 96.00 printed a tight group
Dang it! Now I have to buy some 550!280 Ackley
Savage 110 action
Bartlein Sendero 26" 9 twist
Brass: Peterson
Primer: Fed 215
Powder: Vihtavuori N550 58.5 grains
Bullet: 132 HHT
OAL: 3.370
Crimp: 1/8 turn
Velocity: 3365 average with ES of 7
Group: 1/2" cloverleaf