Speer bullets and Lee dies

[RussellC]

No. The 53 sierra is ok at 2.200" to 2.220"

Good luck.

Right, the 69 grain will be reset to 2.50-2.60....not sure if 2.260 will fit in the magazines and cycle.

Russellc

 

[Blue68f100]

I have several different mfg of magazines. The ASC can take the longest length, 2.290". With Sierra I find the 2.250 for the 53/53 gr work best and 2.260" for the 69gr. The shorter the OAL the more the groups open up in my guns.

 

[RussellC]

I tried some yesterday, the 2.260 rounds fed just fine through Magpul magazines. Now that I know these feed fine, these longer lengths don't seem so odd.

I found my 53 grain bullets (Sierra HP, but not Match Kings) didn't seem to group any better than my 55 grain rounds were. Both were at 2.20. I will try opening them up to 2.250-2.260 and see what happens.

I have 8 lbs of Vaget on the way, will be loading a bunch more when it gets here. Also need some Tac, and CFE 223 from what I have been hearing.

My new build ran like a top, and what a difference a scope makes!

Russellc

 

[horsey300]

I tried some yesterday, the 2.260 rounds fed just fine through Magpul magazines. Now that I know these feed fine, these longer lengths don't seem so odd.

I found my 53 grain bullets (Sierra HP, but not Match Kings) didn't seem to group any better than my 55 grain rounds were. Both were at 2.20. I will try opening them up to 2.250-2.260 and see what happens.

I have 8 lbs of Vaget on the way, will be loading a bunch more when it gets here. Also need some Tac, and CFE 223 from what I have been hearing.

My new build ran like a top, and what a difference a scope makes!

Russellc

The HP 53 will be more "blunt" than the matchking, you might hit the lands sooner than you think, I'd check it first personally.

 

[Blue68f100]

I always determine the Max OAL in my guns with any bullet I choose. While using Sierra Bullets I always start of using their recommend OAL. If I use the same length that Sierra recommends with a Hornady bullet more times than not I'm end to the lands. Always best to check first. Jamming them into the lands can and will cause high pressure issues. Since I have a min spec chamber I normally have to seat the Hornady bullets shorter than what Hornady recommends. Not always but it's running about 60-70%. If your gun is chamber is 556 or 223 Wydle you will not run in to these issues.

 

[RussellC]

No sign of hitting the rifling, perhaps in a bolt gun it would be a larger concern, but with this particular AR 15 it is a pretty big jump to the rifling. Chamber is .223/5.56.

Russellc