Quoted: For the benefit of an AR newbie,  what is m193 and 855? I just got a new BM varmint rifle and love it. With the 1-9 twist what is the general opinion on the best bullet weight to reload with? I've been shooting Black Hills re-manufactured 52 grain match hollow points with great accuracy . Going to try Varget and h335 and probably h322. Was planning on starting out wit 55 grain soft points and trying some 50 grainers too. Let me hear your suggestions. Dick

Hi.

It's hard to see the FAQ up at the top of the forum.  Almost all your questions are answered there.

To start with:

Q. What types of ammo has the US Military used in its M16s and M4s?

Q. Do M193 and M855 shoot to the same point of impact?

We discourage actively talking about powder loads and reloading except in the reloading forum.  (See the post Troy made on that above).

If you can tell me what sort of use you have for these rounds (self defense, match accuracy, plinking, hunting...) I can make some suggestions.  There are also some general suggestions in the AR15.com Ammo-Oracle including my specific recommendations for different purposes which you can find listed in: Q. What ammunition does Tatjana recommend for self-defense, storage, plinking, training and match use?  The other mods have their recommendations in there as well.

Feel free to post any other questions you might have in here.