Anybody shooting AR-Comp with 75 gr. bullets?

[goodoleboy]

Like most of us, I've been having trouble finding powder for reloading in the last 6 months or so. I had a fairly decent stock of my beloved H-4895 until just recently when I got down to my last 1/2 pound and decided it was time to procure some more. Well... at all the local shops, all I could score in the AR world is BLC-2, and AR-Comp. Since I don't have a progressive press and like to hand-trickle every charge (a bit of overkill, I know), I went with AR-Comp for the first time.

I am awfully fond of the 75 gr. Hornady BTHP with just over 23 gr. of H-4895, but alas no H-4895 was to be found, so, I went with AR-Comp. As mentioned before, extruded powders don't intimidate me since I hand-trickle each charge. On the Alliant's website, the max charge was 22.9 gr with 75 gr. bullets. As usual, I reduced 10% (20.6 gr.) and loaded five rounds every few tenths of a grain till max. I'm shooting a 16" with a carbine-length gas system (LE Carbine 6920). I haven't taken it to the range yet, I'm just curious what loads you have found most accurate with a similar set-up? I'll be sure to add a range report once I take her out with the new powder/bullet combo.

Just for reference, I have CCI 400 and BR-4 primers at my disposal as well as an assortment of Lake City brass (05-09) and some once-fired Winchester .223 brass.

[CaptainN8]

Lots of data for it in the new Hornady book. I'm looking forward to using it as well. Interested in what everyone has to say.

[weg111]

Sorry, I can't answer the question. But I wanted to add to it. How about Alliant's 2000-MR and 1200 -R for 223 rounds through an AR? Does that powder work for through a semi auto? Thanks

[rocsteady]

Sorry, I can't answer the question. But I wanted to add to it. How about Alliant's 2000-MR and 1200 -R for 223 rounds through an AR? Does that powder work for through a semi auto? Thanks

Find your powder on this chart and see if it's around other popular AR powders that you know are good for whatever weight bullets you're using.

http://www.hodgdon.com/burn-rate.html

[WC 2-3]

I've been using AR-Comp since it first came out and its my go-to powder for 77's.

First, keep in mind that the 75 load data you see is for the A-Max bullet, not the BTHP. You should look at the SMK 77 data that lists a max of 22.1.

I load mine to 22 grains and it shoots the 77's great. The powder is a little faster than RL15 and velocity is a little slower, but it is more accurate for me.

edit: I've run the 77 Nosler's up to 22.6. I had to stop there due to pressure and I did load up to 22.8 and didn't feel at all comfortable shooting that load and will pull those down. This was in a BCM 5.56 16" middy barrel.