Some more amazing results with SMP 842

[Dolomite_supafly]

Today I decided to load some ammo for my lightweight AR.

I decided to use 53 grain SMK's because I have a bunch and they will work great with the AR's 20" 12 twist barrel.

Warning:

This powder tends to be a bit fast. With 53 grain SMK's I would consider 26.7 the absolutely maximum charge regardless of weapon platform. I would consider 24.0 a good starting load with the 53 SMK's. But that is in my weapon with me shooting it. You need to work up your own loads.

I load using a chronograph. I load to what I consider the maximum for the bullet in the paltform or until I see signs of pressure. I slowly worked up to 26.6 grains of powder with the LC primed brass. The bullet was crimped in place.

I shot a random sample across the chronograph and got a velocity of 3,383 fps. But what is amazing is the ES was 2.83 fps! And what was even more amazing is the SD of 1.73 fps!!! These are numbers that are rarely seen. I did no weigh the powder charges. Once I had a few consistent drops I began loading. I checked the last drop and it was exactly as the first.

This powder meters so great and is very, very consistent.

Dolomite

Edited June 21, 2012 by Dolomite_supafly