Rich 10mm
Member
I am trying to replicate the 7.62 NATO cartridge, designation M80, which will be fired from a Sig 716 AR-10 style rifle using a Hornady 150gr FMJ. Any recipes to get me started would be appreciated.
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148 gr IMI FMJBT 42.5 grs AA2520 wtd Lot 9595 Czech Mixed LC WLR OAL LT 2.800, set to cannelure
30 April 2008 T = 75 °F
Ave Vel = 2496
Std Dev = 33
ES = 88
High = 2537
Low = 2449
N = 10
poor accuracy
150 gr Hornady FMJBT 42.5 grs AA2520 wtd Lot 9595 Czech Mixed LC WLR OAL 2.785
30 April 2008 T = 75 °F
Ave Vel = 2499
Std Dev = 29
ES = 94
High = 2539
Low = 2445
N = 10
best accuracy, shot high
150 gr Hornady FMJBT 43.0 grs AA2520 wtd Lot 9595 Czech Mixed LC WLR OAL 2.785
30 April 2008 T = 75 °F
Ave Vel = 2544 2551
Std Dev = 32
ES = 84
High = 2574
Low = 2490
N = 5
poor accuracy
148 gr IMI FMJBT 41.0 grs IMR 3031 wtd Lot 385 Mixed LC WLR OAL LT 2.800, set to cannelure
30 April 2008 T = 62 °F
Ave Vel = 2697
Std Dev = 29
ES = 105
High = 2743
Low = 2638
N = 10
150 gr Hornady FMJBT 40.0 grs IMR 3031 wtd Lot 385 Mixed LC WLR OAL 2.785
30 April 2008 T = 62 °F
Ave Vel = 2676
Std Dev = 21
ES = 61
High = 2705
Low = 2644
N = 10
150 gr Hornady FMJBT 41.0 grs IMR 3031 wtd Lot 385 Mixed LC WLR OAL 2.785
30 April 2008 T = 65 °F
Ave Vel = 2718
Std Dev = 54
ES = 157
High = 2780
Low = 2623
N = 10
Outstanding accuracy
150 gr Hornady FMJBT 42.5 grs AA2520 wtd Lot 9595 Czech Mixed LC WLR
OAL 2.785
30 April 2008 T = 65 °F
Ave Vel = 2700
Std Dev = 29
ES = 89
High = 2734
Low = 2645
N = 10
Thanks guys I appreciate all the info. I’m using a 16” suppressed barrel
Since IMR went to a short cut IMR 3031,
That recipe goes back to the early 1960's Lyman's loading data for the .308/7.62 NATO and is very close to the .300 Savage 150gr. jacketed accuracy load (the load the NATO cartridge is based on). For IMR 4895, 41gr. is start, 42/43 is optimal, 45gr is max and rarely accurate. 42/43gr. of IMR 3031 is a little faster but I've never seen any advantage to 3031 over 4895 in that cartridge. NB: I sold my last .308Win years ago and my last 7.62 NATO rifle a few years before that so it's been a while since I used or loaded for either one. Just in the interests of full disclosure, I always used Lyman's data and stuck as close to the .300Sav/.308Win data as possible in all of my rifles for either chambering. The 7.62CETME in FR7/FR8 rifles I ran with much, much lower charges.Loading a 150 with 42 to 43 grains of IMR 4895 gives all the velocity and function I need.
Do you happen to know when that was?
Now... if we can get them to come up with an 'IMR4064SC...' I'd be in heaven.