So help me build my first load thread:

[sawman556]

Background:

Barrel: Noveske 14.5" LW SS middy 5.56 7PT

Powder: H335
Bullet: Hornady 75gr. HPBT
Primers: CCI 400
Brass: Various once fired 5.56, Federal, PMC, LC, Winchester


So I have 350 pieces of once fired 5.56 brass ready to roll. It's been tumbled and resized. Primers are out. What's next? Should I trim to length? Is 1.750 my desired length?

 

[lte82]

Trim to 1.75, deburr and chamfer, prime, dump powder, seat bullet. Easy.....

 

[rduckwor]

What's the purpose? Plinking - If so, find a mid range load that will work for all the different headstamps and go forth and sin no more.

Accuracy? Well, sort that brass by headstamp.

Take the headstamp that you have the most of and work up a load that gives you what you want.

Dan Newberry's OCW method will save you time and $$.

 

[Sig Marine]

Trim to 1.75, deburr and chamfer, prime, dump powder, seat bullet. Easy.....

If you have mixed brass of unknown origin, some of it may be military and have had crimped primers. Check your brass. If any had crimped primers, they need to have the primer pockets swaged BEFORE installing your primers.

 

[sawman556]

That's what I was thinking.

1) When I seat my bullet should my OAL be 2.250?

2) What is COL?

3) Is a taper crimp the same as a roll crimp?

4) Should I set up my seating die to use the crimp or not? I've read varying opinions on this. What's the +/- of crimping?

Thanks for helping me!!!

 

[sawman556]

What's the purpose? Plinking - If so, find a mid range load that will work for all the different headstamps and go forth and sin no more.

Accuracy? Well, sort that brass by headstamp.

Take the headstamp that you have the most of and work up a load that gives you what you want.

Dan Newberry's OCW method will save you time and $$.

Accuracy is my goal. Not sure if I want to get F-class crazy but under .5MOA or better would be nice. I shoot steel plates mostly @ 300yds. 4", 6" and 8".

 

[sawman556]

If you have mixed brass of unknown origin, some of it may be military and have had crimped primers. Check your brass. If any had crimped primers, they need to have the primer pockets swaged BEFORE installing your primers.

I thought it would all be military crimped brass but the primers just pop out with my FL die. Most of it is PMC XP193 and Winchester M855. No .mil crimps? I have 7 5lb. buckets full of it!

 

[Sig Marine]

Taper crimp vs roll crimp:

A Roll Crimp is a slight inward roll of the cartridge case into the crimp groove (cannelure) of a bullet. It can't be used on bullets without the groove.

A Taper Crimp just "tightens" the casing around the bullet -- essentially, it removes the slight belling that occurred with the expanding die to allow the bullet to smoothly enter the case.

For more information: https://www.google.com/search?q=taper+crimp+vs+roll+crimp&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-USfficial&client=firefox-a&channel=sb

 

[sawman556]

Thank you,sir!

 

[sawman556]

Made 10 reloading trays! I'm hoping to get to the range today. I'll let you know how it goes!