Sisco Posted February 9, 2014 Report Posted February 9, 2014 For those of us who have the Standard Ar10 rifle with the 20 inch barrel, how about some experiences with what your favorite load is? With a 1 in 11.25 twist rather then the AR10T's 1 in 10, what bullets weights/powder combos have you found the best? As most of you know, Armalite recommends the 168 gr for the "T", but for the standard no real recommendations. Plus 20 versus 16 barrel could make some differences. Interesting enough, I have had best results with M118LR Lake City 175 gr SMK's. I have pretty good luck with 147 gr Nato surplus, but not as accurate. 2 - 2.5 MOA versus 1.5 or less. ( on my non coffee drinking days) right now the M118LR or my reload equivalent remains my favorite, but I want to do some experimenting with the Barnes line of bullets. Jump in with your thoughts.
Dane Armory Posted February 9, 2014 Report Posted February 9, 2014 Well here you go, JMO... 1-11.25" TWIST BARREL will like 125gr to 155gr projectiles. The heavy bullets that you list are not designed for your barrel. Try some ballistic tipped 125gr or 130gr ammo. Also try some hollow point 150gr or 155gr ammo. It may improve the accuracy of your gun by shooting a more approate wieght ammo. Good Luck!
Sisco Posted February 9, 2014 Author Report Posted February 9, 2014 Well here you go, JMO... 1-11.25" TWIST BARREL will like 125gr to 155gr projectiles. The heavy bullets that you list are not designed for your barrel. Try some ballistic tipped 125gr or 130gr ammo. Also try some hollow point 150gr or 155gr ammo. It may improve the accuracy of your gun by shooting a more approate wieght ammo. Good Luck! If my memory is right, Armalite recommends 150 grain or higher. I can't remember offhand if that is just for the AR10T. We are moving and my manual is packed. The lighter Barnes bullets interest me as they have some progressive thoughts on bullet design and corresponding ballistic coefficients. I do intend to pick some lighter ones up. Any preferred powder and load?
Sisco Posted February 9, 2014 Author Report Posted February 9, 2014 Just logged on a reviewed Armalite tech notes. Only mention is not to use heavier than 180 gr bullets in 1 in 11.25 twist. Could not find much else. I will have to spend some time and do some research on those lighter bullets apparently.
Dane Armory Posted February 9, 2014 Report Posted February 9, 2014 I'm not at home so this is from memory... 1-12" twist , 110gr to 130gr bullets 1-11" twist , 125gr to 155gr bullets 1-10" twist , 147gr to 180gr bullets Nosler Ballistic 125gr Hornady 150 hpbt Imr 4064 (stick powder) Hodgdon H335 (ball powder)
Sisco Posted February 9, 2014 Author Report Posted February 9, 2014 Correction: I meant Berger hybrid bullets not Barnes. Thanks Dane.
unforgiven Posted February 9, 2014 Report Posted February 9, 2014 DSG has this http://dsgarms.com/ProductInfo/M118LR-20.aspx got 3 boxes last night.
Sisco Posted February 10, 2014 Author Report Posted February 10, 2014 DSG has this http://dsgarms.com/ProductInfo/M118LR-20.aspx got 3 boxes last night. Good stuff. I got lucky last summer through a friend and got 700 175gr SMK BTHP bullets, so I am rolling my own for now. 42 gr RL15, Winchester Large Rifle Primers, Lake City and Federal brass.
unforgiven Posted February 10, 2014 Report Posted February 10, 2014 700....way to go brother. <thumbsup>
mineralman55 Posted February 10, 2014 Report Posted February 10, 2014 39.5 grains of TAC under a 168 BTHP Sierra. LC case full length sized, LOA 2.800". Great load. Too bad there's no TAC anywhere to be had.
Dane Armory Posted February 10, 2014 Report Posted February 10, 2014 39.5 grains of TAC under a 168 BTHP Sierra. LC case full length sized, LOA 2.800". Great load. Too bad there's no TAC anywhere to be had.there was some at my {2nd closest} LGS yesterday. 3 1# bottles.
survivalshop Posted February 10, 2014 Report Posted February 10, 2014 .308 - 7" * for heavy VLD bullets and/or subsonic ammo. - 8" for bullets heavier than 220 gr. - 10" for bullets up to 220 gr. - 12" for bullets up to 170 gr. - 13" * Ratchet rifled 4 groove - 14" * for bullets up to 168gr. - 15" * for bullets up to 150 gr. - 17" * for bullets up to 125 gr. Surely a 1-11.25 will fall in between 1-10 & 1-12
Dane Armory Posted February 10, 2014 Report Posted February 10, 2014 .308 - 7" * for heavy VLD bullets and/or subsonic ammo. - 8" for bullets heavier than 220 gr. - 10" for bullets up to 220 gr. - 12" for bullets up to 170 gr. - 13" * Ratchet rifled 4 groove - 14" * for bullets up to 168gr. - 15" * for bullets up to 150 gr. - 17" * for bullets up to 125 gr. Surely a 1-11.25 will fall in between 1-10 & 1-12These appear to be the maximum weight to be used with their barrel per twist rate.
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