basic question: working up a short range load

A

anaxagoras

Inactive
I've done reloading for distance and the ladder test at 400 yards, but i want to make a load for my ar15 for =<100 yards for tactical training and some local matches.

The ladder test is not recommended for less than 300 yards, so would i be better off just reloading batches of 5-10, seeing how they group and chose the best?
 
I can't really tell you a different way of working up a load. I start a hair above the starting load and work up .5gr to max and see what is most accurate, then I pick the .5 grains it's most accurate between and try to refine it to a .2gr. in my ar, I can get better 100 yard groups with lighter flat based bullets, they don't stay on track out past 200 yards, and that's when the heavyweight boatails come into play.

these have been my most accurate 100 yard bullets
http://www.midwayusa.com/product/77...er-224-diameter-60-grain-flat-base-box-of-100
 
sure those will be fine. I stay a little heavy just because my 1:7 twist likes em a little long/heavier. that'll prob be optimal if you have a 1:8 or 1:9 like most. good luck
 
Basic load work up is determine a load....bullet, seating depth, powder, charge, case, case prep steps, primer and then vary 1 component and observe effects on velocity, accuracy and pressure. Usually, the bullet is unchanged.

In rifle, I usually pick powder and bullet based on reputation, data, purpose, etc. Then vary charge weight and the vary seating depth. Initial seating is lands - 0.030" or mag length. If really looking for accuracy, I might vary the charge again to see if I can get better.

A solid rest and chronograph helps.
 
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