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Posted: 4/2/2010 9:42:01 AM EDT
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I hope to start relaoding ammo for my AR10 soon. Anyone have anygood data thay could share?
I'm thinking of using stick powder and 110gr A-max Horn. bullets. |
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Loading for AR10s is all over the place depending on your chamber, barrel length, barrel profile, amount of gas, bullet choice, powder choice, brass choice, etc.
You really have to search around to find loads for the AR10 as most pet 308 loads are for bolt guns or M1As. I am changing out my barrel so I am done trying to work up loads for my current one but I never really found the sweet spot. Good luck |
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Quoted:
I hope to start relaoding ammo for my AR10 soon. Anyone have anygood data thay could share? I'm thinking of using stick powder and 110gr A-max Horn. bullets. Sir, assuming you're asking about .308 Win. loads I have to agree with Mr. Scalce. The .308 Win. loads I use were developed in my M1As, and while they work well in my R700, not true for my DPMS LR-308. I believe a lot has to do with the direct impingement gas system of the AR type rifle. I've concluded that to make this rifle shoot better I have to develop a whole 'nuther set of loads for it. My solution considering I have to spend the time working up loads was to build another rifle on an AR10 receiver chambered for 260 Rem. I should have it ready to shoot in about another week. I don't know why you selected the 110gr Amax, I would suggest a heavier bullet. Most competitive shooters still using this cartridge prefer the Sierra 155gr or 168gr SMKs, or 175gr. if you'll be shooting at 600yds and beyond. I suggest with these bullets you start with about 39gr. of IMR 4895 or H4895 and work up. HTH, 7zero1. |
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My AR10 was originally a 20" A2. It was one of the early guns, had a 3 port comp, and a Bausch and Lomb 5-15x50 on top. It REALLY liked 168 and 175 SMKs on top of a mild charge of Win. 748. My best group was 5 shots into just over .75" @ 200 yds. Yes, 200.
It also liked 150 Nosler BTs on top of a mild charge of IMR 4064. 5 shot .5" @ 100 was normal. Deer hunting load. I bought it new from a dealer friend that was shooting his in our local matches. He claimed 1/2 MOA, and I was skeptical, but I tried it. I sent mine to Armalite for some work, and while on the phone, I asked the guy I was talking to about the accuracy. (Now this was an A2, not an AR10T) He said that they had customers report that sometimes on the early guns, and wasn't surprised at all. He said I must have gotten a good barrel. Yea, no shit. I shoot 3gun with it, and the carry handle scope mount doesn't work well for that, so it now has an 18" upper on it built by JP. Someone got a good deal on the old upper. You have to watch for pressure early. I could not get to max loads before seeing pressure signs in either upper. I have read this and talked to others that have found the same thing. My newer upper usually runs 110 and 125 bullets. Last year while sighting in before a match in N.M. it shot 3 125s into a bit under 4" @ 400 yds. |
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Thanks guys,
Yeah, I plan on using 110gr Horn. and 125TNT speer first. The rifle only has a 16'' barrel upper and I think that the heavy bullets will drop like a stone with it. I also think I will get better/more gas with the lighter bullets with hot loads and shoot flatter. I'm not really looking for a tack driver but more of saving money on ammo. |
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Quoted:
Thanks guys, Yeah, I plan on using 110gr Horn. and 125TNT speer first. The rifle only has a 16'' barrel upper and I think that the heavy bullets will drop like a stone with it. I also think I will get better/more gas with the lighter bullets with hot loads and shoot flatter. I'm not really looking for a tack driver but more of saving money on ammo. I hope your AR-10 functions with light weight bullets, mine did not. |
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is there a reason for going with such light bullets? 308's are much more efficient running in the 150-178 gr range...better down range ballistics, less wind drift. I use mine mainly for 3gun and action rifle matches. Double taps on paper using a 110 or 125 with lighter recoil than a 168 is a faster time on the stage. One of the top 3gunners in the country runs a DPMS with 110 Hornadys. Fast double taps, flat trajectory, and plenty accurate to 400 yds plus. |
| For 125 TNTs: 47.5 gr. H-335, Lake City brass, Win LR, 2.700 overall length, 2.045 to the ogive. Ave. vel: 2924, groups about .75 moa out of my stainless barreled carbine. IMR 4895 was pretty good but there was not enough room in the LC brass. Reloader 15 is excellent for heavier bullets as is Vit N540. The Vit is 50% more cost though. My Armalite functioned fine, even on the reduced starting loads with the 125s. I can usually get to reloading manual max and not see pressure signs however best accuracy is about 1/2 to 1% below that. Also, haven't tried it yet, but Varget is reputed to be the 'it' for the .308. |
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Quoted:
For 125 TNTs: 47.5 gr. H-335, Lake City brass, Win LR, 2.700 overall length, 2.045 to the ogive. Ave. vel: 2924, groups about .75 moa out of my stainless barreled carbine. IMR 4895 was pretty good but there was not enough room in the LC brass. Reloader 15 is excellent for heavier bullets as is Vit N540. The Vit is 50% more cost though. My Armalite functioned fine, even on the reduced starting loads with the 125s. I can usually get to reloading manual max and not see pressure signs however best accuracy is about 1/2 to 1% below that. Also, haven't tried it yet, but Varget is reputed to be the 'it' for the .308. thanks dude, This is what I was wanting to hear. |
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