There is a big difference between a 20-24" bolt gun and a 16" carbine. I don't remember ever trying a different bullet but I might have. When loading for a 5.56 NATO-chambered AR, the COL is restricted to 2.260 inches. "If you can't explain it to a six year old, you don't understand it yourself." IMR4198 was popular with the benchresters shooting .222 Rem chambered tack drivers' 50 to 55 grain bullets back in the '50's. The data I viewed from imr shows a max load below what you listed if that is in fact correct.You may ffind a very accurate load for your gun using this powder, if you use it as a single shot. Exactly what I was looking for for my 52 and 53 grain rounds. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. So no metering problems. But as you probably require many rounds being made for your up coming event. The chamber leade is also cut differently, with the .223 being shorter. IMR 4198 for .223 / 5.56 questions. This article is intended for handloaders who have experience reloading for their bolt-action rifles and now want to handload for an AR-style semiautomatic rifle. I am new to reloading the .223 round. . Metered beautifully, at the charges I was using, it was very dirty. Happy to find it in stock! This powder works well in both semi-auto and bolt action rifles. You are the only person that can answer your last question. Right now I'm liking 24.5gr of RL15. You might be able to chamber that round in your bolt gun by forcing the bolt to close, but youll likely jam the action in an AR that the forward assist cant overcome. I've always used both 4895 powders for my military bolt guns, but have heard it gives good results in the 223/5.56 caliber. E,)Y~.x7 )J7_Kz~O]OX8y'b.w`6HQ#R4u ( Ive weighed several hundred pieces having various headstamps and concluded, in most cases, the difference in ballistic performance is negligible. But because of its grain size being so small.
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