Good choice of components, you'll make good ammo with it.
Lotsa info on this subject (M14 ammo), google is your friend.
My suggestions:
- seat the bullet to be no longer than standard .308 magazine length (2.80" COAL), or if you prefer you can seat it so that the cannelure lines up with the case mouth.
- I wouldn't bother crimping the case mouth.
- full length size your brass each time you fire it
- keep your brass together and keep track of it. Try not to reload piece of brass in a box until all rounds have been fired (i.e. only load the whole box of empties). Every time you reload your box of brass, add a "checkmark" to the box.
- when it is time to trim your brass, trim every piece in the box to the same length.
- be sure your primers are fully seated. They must all be "below flush" with the case head.
- load a reputable charge of H4895. You might want to listen to what other M1A/M14 shooters are using. Max loads (e.g. published Hodgdon data) might be safe in your rifle but they might also beat the brass up more than you need/want to. If you are plinking at 100 yards or 300 yards (heck even 600 yards), a grain or two less powder is not going to hurt your performance. Go for something reliable and accurate. H4895 is a tolerant and forgiving powder, pretty much any safe charge of it ought to give you pretty good accuracy.
