Snakum
Member
Another one of those things I wanted to know but couldn't find in one place, so I'm posting my results over many, many rounds of ammo sent down range thru my Marlin XS7. Listed accuracy was the average over many three-shot strings, and all strings were shot with at least a ten minute cool-down between each group. All strings were from a bipod and using a rucksack or sandbag in the rear. No bench rests were used. This is 'real-world' accuracy where the once-in-a-blue-moon groups were merely part of the average.
The results were surprising in some cases, re. Georgia Arms and Silver Bear. YMMV of course.
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Rifle: Marlin XS7, stiffened forearm and Devcon bedded recoil lug area
Caliber: 308
Barrel: stock, 22"
Sights: Redfield Revolution 4-12x40 duplex reticle
Support: Harris 13"-32" bipod
Federal 150gr PowerShok SP ... BC = .289, Avg Vel = 2675
Accuracy ... 1 MOA to 250 yards, 1.2 MOA from 250 to 600 yards
Notes ... No missfires, accuracy very consistent
Barnul Brown Bear 145gr FMJ ... BC = ?, Avg Vel = ?
Accuracy ... 1.1 MOA to 200 yards, 1.5 MOA from 250 to 500 yards, 2 MOA at 600 yards.
Notes ... No misfires, accuracy was so-so, didn't eject well.
Barnul Silver Bear 140gr SP... BC = .250, Avg Vel = 2710
Accuracy = .75 MOA to 300 yards, 1.2 MOA from 300 to 500 yards, 1.75 MOA from 500 to 600 yards.
Notes ... surprisingly accurate and consistent, no misfires.
Georgia Arms 168gr BTHP ... BC = .488, Avg Vel = 2600
Accuracy ... .75 MOA to 500 yards, 1 MOA at 600 yards.
Notes ... almost mirrored Federal GM Match, consistent accuracy, large POI change over other loads.
Federal BTHP Match ... BC = .488, Avg Vel = 2620
Accuracy ... .75 MOA to 500 yards, 1 MOA at 600 (corrected).
Notes ... best of breed (it is the gold standard, of course), very consistent accuracy, POI change over other loads.
PMC Bronze 147gr FMJBT ... BC = .369, Avg Vel = 2751
Accuracy ... 1.5 MOA to 200 yards, .8 MOA from 200 to 400 yards, 1.4 MOA from 400 to 600 yards.
Notes ... generally good accuracy and reliability but some lots of ammo are all over the place, not consistent, brass good for reloading. Accuracy in the "good lots" was odd, in that it was over MOA under 200 yards then went under MOA past that.
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Hope this info helps someone else down the road. Appreciate any comments or suggestions on the data. It'd be nice to have more experienced voices weighing in, for those who come after.
The results were surprising in some cases, re. Georgia Arms and Silver Bear. YMMV of course.
----------------------------------------------------------
Rifle: Marlin XS7, stiffened forearm and Devcon bedded recoil lug area
Caliber: 308
Barrel: stock, 22"
Sights: Redfield Revolution 4-12x40 duplex reticle
Support: Harris 13"-32" bipod
Federal 150gr PowerShok SP ... BC = .289, Avg Vel = 2675
Accuracy ... 1 MOA to 250 yards, 1.2 MOA from 250 to 600 yards
Notes ... No missfires, accuracy very consistent
Barnul Brown Bear 145gr FMJ ... BC = ?, Avg Vel = ?
Accuracy ... 1.1 MOA to 200 yards, 1.5 MOA from 250 to 500 yards, 2 MOA at 600 yards.
Notes ... No misfires, accuracy was so-so, didn't eject well.
Barnul Silver Bear 140gr SP... BC = .250, Avg Vel = 2710
Accuracy = .75 MOA to 300 yards, 1.2 MOA from 300 to 500 yards, 1.75 MOA from 500 to 600 yards.
Notes ... surprisingly accurate and consistent, no misfires.
Georgia Arms 168gr BTHP ... BC = .488, Avg Vel = 2600
Accuracy ... .75 MOA to 500 yards, 1 MOA at 600 yards.
Notes ... almost mirrored Federal GM Match, consistent accuracy, large POI change over other loads.
Federal BTHP Match ... BC = .488, Avg Vel = 2620
Accuracy ... .75 MOA to 500 yards, 1 MOA at 600 (corrected).
Notes ... best of breed (it is the gold standard, of course), very consistent accuracy, POI change over other loads.
PMC Bronze 147gr FMJBT ... BC = .369, Avg Vel = 2751
Accuracy ... 1.5 MOA to 200 yards, .8 MOA from 200 to 400 yards, 1.4 MOA from 400 to 600 yards.
Notes ... generally good accuracy and reliability but some lots of ammo are all over the place, not consistent, brass good for reloading. Accuracy in the "good lots" was odd, in that it was over MOA under 200 yards then went under MOA past that.
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Hope this info helps someone else down the road. Appreciate any comments or suggestions on the data. It'd be nice to have more experienced voices weighing in, for those who come after.
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