How much RL15 are you .223AI guys using?

*Nine

Tactical Operator
Full Member
Minuteman
Apr 17, 2009
872
48
USA
I was trying out some various loads today at the range in anticipation of getting to chrono some stuff in a week or two (my local range doesn't let you use a chronograph.) Anyways, I worked up some rounds, using 75gr A-Max and powder charges ranging from 26 up to 27.2 grains of RL15. It was in the mid 60s today, so I was interested in where I'd start seeing pressure signs. Now, I know that the fastest loading isn't necessarily the most accurate loading, but before I go chrony some stuff I'd like to know where to start with my loads. All the way up to the 27.2 gr loads I didn't see any pressure signs to cause concern. The primers weren't getting flattened and the brass extracted with no issues. I expected that somewhere in the range of loads I had I'd see pressure signs and would have to step down the load a little bit. I was really surprised to see that none of them showed real signs. I'm using Lapua brass. Any ideas?
 
Re: How much RL15 are you .223AI guys using?

I've gotten the best numbers with 26.3gr of RE15 & Lapua brass. Had to switch to a new lot though so I'm headed out Monday to start over weather permitting.
 
Re: How much RL15 are you .223AI guys using?

I used varget and W748 in mine and it loves it, the 223 ai is amazing it gives you way more velocity than you would expect out of that little casing.
 
Re: How much RL15 are you .223AI guys using?

If I'm getting good accuracy with 27+ gr. of powder and no pressure signs, is there any reason not to run it as fast as I can while maintaining accuracy? My current range is limited to 100 yards, but in another week I'll have the opportunity to test them at 300 yards to see how accurate they're shooting.