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Thread: Ar10 308

  1. #1

    Ar10 308

    What's your favorite boolit for an ar10 in 308? I'm thinking about trying the 180 grain boolits by penn bullets before I buy a mould to make my own. Any input would be appreciated. Thank you.

  2. #2
    Boolit Grand Master popper's Avatar
    Join Date
    Jun 2011
    Accurate 31-165C

  3. #3
    And that feeds nice in your ar? How fast do you shoot it?

  4. #4
    Boolit Buddy mehavey's Avatar
    Join Date
    Aug 2012
    Lynan's 311332
    Barest ALOX film/oven-dried at 220 for 30 min/Cool/Shoot the next day

  5. #5
    Boolit Master

    Join Date
    Sep 2010
    Colorado Springs, Colorado
    NOE 309-150 3R Spitzer with gas check, 2250 FPS from a Sig Saur 716 Patrol, 16”. Same velocity from my Mossberg Scout 16” Scout, slightly higher from my Springfield 22” M1A, need to chronograph that next time out. I have read where others are having great success with heavier boolits, I bought the NOE for 300 BO and started using it in the 308s I picked up.
    Common sense Gun Safety . . .

    Is taught at the Range!

  6. #6
    What lube are you using? Sizing to .309? Any leading of your gas systems?

  7. #7
    Boolit Master

    Join Date
    Sep 2010
    Colorado Springs, Colorado
    I stopped using lube when I started powder coating and size to .310. Works great, feeds great. I started using the Lee C312-155 2R with 50/50 Alox/mineral spirates, 2 coats, .310, but when I switched to PC the boolits got fatter and caused feeding problems. Fortunately, I was recently gifted an Argentine Mauser in 7.65x53mm that should work great for the Mauser.

    Cast rifle has been a fairly recent endeavor, the last few years or so, vs handgun for 45 years. I’m liking the results of minute of soda can at 100 yards off hand. Powder coating really shrank my groups. No leading in the Sig or the Springfield gas systems.
    Common sense Gun Safety . . .

    Is taught at the Range!

  8. #8

    Are you shooting reduced loads or just going for it like j-bullets?

  9. #9
    Boolit Man
    Join Date
    Apr 2010
    Near Selma Al
    These Lee Molds are all good choices. The 2R molds can be had in 6 cavity versions.
    C312-155 2R
    C312-160 2R Tumble Lube version
    C309-160 R
    C309-180 R
    I have had 311332 bullets break at the little cleaning groove ahead of the rifling bands.
    Bruce B article is good source for powders and loads
    M1A loads work in AR10s.
    Lee reloading manual 2nd edition also a section on reduced loads with rifle powders.
    I recommend keeping speeds under 1900fps with uncoated lead bullets.
    Powders in the speed range of 4895, 4064, Varget, BL-C(2), 748 work well with my AR10s.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check