27 GPC

19 June 2019, 21:57

RMiller

27 GPC

I picked up a barrel from Mad Dog weapon systems and tried a few loads.

My Rifle is on an AR15 platform. 22" barrel.
I went with the 130 Speer Boattail because it is supposed to be a soft bullet that I am hoping will be appropriate for deer hunting considering the modest velocity.

I tried a couple different powders but the one that stood out from the rest was AR-COMP.

130 speer boat tail MDWS GPC Starline brass, CCI 450, Seated at 2.295"

Alliant AR-COMP

29 ---- 2611
29.4---- 2644
29.7---- 2677
30 ---- 2691, 2716

These work in my rifle, please use proper load techniques in your rifle.

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Yesterday at the range I shot some at 100 Yards.

The groups were pretty good and especially good considering the shooter.

Three of the 30 grain loads were 2675, 2688, 2678.

20 June 2019, 01:00

p dog shooter

Well I am sure it well kill deer just fine.

20 June 2019, 03:41

thecanadian

Thats some mighty fine shooting there.

"though the will of the majority is in all cases to prevail, that will to be rightful must be reasonable; that the minority possess their equal rights, which equal law must protect, and to violate would be oppression."

---Thomas Jefferson

20 June 2019, 04:05

RMiller

If anyone was wondering, the 27 GPC is a 6.8 SPC improved of sorts.

6.8 SPC ammo can be fired in this chamber and the fire formed brass adds a couple grains capacity over the 6.8 SPC. New brass is available as are dies.

I think this is a useful cartridge that is not known well enough. Anyone that reloads can easily be up and running with this round.