Ok Ill rise to the bait. LOL what would be your favorite powder ? I have just been going by whats in the reloading manuals and not shot any on the range myself yet. 748 looks good also IMR 3031 maybe>
No real favorite powder here, just a range of them which suit a particular job. For my own shooting, the vast majority of what I do in 223 is competitive; 77s and 82 grain bullets for HighPower across the course matches. There, I've used Varget for years now. The other big favorite is RL-15, and it'll cover exactly the same range of uses that Varget will. Also started using N135 and N140 in recent years, and having very good results with them as well.
In the lighter weight (mid range, 50-60 grain) bullets, run the powders I mentioned earlier. They'll serve you well, for both accuracy and velocity.
Again, can't really say there's a favorite powder, but there are some I avoid if I can. The IMR 3031 is one of them. Good powder, and capable of very good accuracy (Remington used to use it for their 308 Win accuracy test loads in the Custom Shop for testing 40-Xs), but it's a bitch to run through a measure. Bridges very badly and you're crunching powder on every stroke. If you're weighing it it's no worse than any other powder, but it's not powder measure friendly. The 748 (and any other ball powder, for that matter) goes through a measure like water. Doesn't necessarily produce better loads, but it is easier to get along with at the reloading bench.
I really appreciate your help. I have about desided that maybe 748 would be the way to go. I am always looking for the most speed and accuracy I can get. But the AR15 is not the same as say a 30/338 Lapua or 300 Ultra.
No, it certainly isn't. For one thing, they're generally found only in bolt guns, and the AR's a whole different animal. Hate to beat a dead horse here, but this is my usual rant about loading for ARs, or other semi-autos. It's an example of advanced handloading, and needs to be treated entirely differently than does bolt gun reloading. Use gages to determine your sizing, full length resize ALWAYS, and you may even want to go to small base dies if there's any hint of chambering issues.
Better than my running all this down again, check out Glen Zediker's "Handloading for Competition". There's also a section on reloading for gas guns in the Sierra manual, and it's pinned on www.usrifleteams.com under their reloading forum. The Precision Shooting Reloading Guide (not a relaoding manual) has a chapter by John Feamster on Service Rifle reloading that's worth its weight in gold. If you're new to gas guns, check these sources out. They're worth the time, and could save you some trouble. In the meantime, any other questions, just post 'em right here!
if your rifle has a 12 twist and I had to shoot it, I would load either the 53 grain Vmax or the 55 grain ballistic tip over 25.5 grains of N150. If I don't need killing power I would load the 52 grain amax for pure accuracy.