Shoulder bump question

[Wolfdog91]

So ran across something last night I wanted to see mabye someone might have an explanation for. Was re sizing some brass last night, full-length lake city twice fired 5.56 all from my gun, and noticed it I couldn't successfully bump my shoulder back the four thousands I wanted with one stroke. I'd do one stroke and they'd pop out like ( and I think these are the numbers I'd have to look back in my nots to see exactly but it was) 1.455-1.456 no matter how hard I worked the press handle it happened. I'd try and fool around with my die and it would pop out 1.453 well ended up having to work em once ,rotate the case in the shell holder and run it again and they almost all popped out a perfect 1.454 in the second stroke. Anyone ever experienced anything like that ? Living with Hornady one shot after they where decapped and wet tumbled. There's are also a hotter load so man that has something to do with it ?
Thanks

[Nobade]

Cases need to be annealed so they will consistently bump back.

[Winger Ed.]

AR chambers tend to be rather generous and forgiving.
If they cycle and chamber up OK, I don't worry about it.

[cwlongshot]

AR chambers tend to be rather generous and forgiving.
If they cycle and chamber up OK, I don't worry about it.


THIS!!!

Not all chambers are created equal.

This is overall a good pratice but slightly taken out if context for new(er) reloaders.

CW

[rockshooter]

just because I'm old and opinionated, I always load .223 using small-base dies adjusted per mfg instructions- slight roll-over at the top of stroke. Since I've never experienced issues using this method, I have no clue as to shoulder measurement. If it ain't broke, I'm not gonna fix it.
Loren

[Winger Ed.]

just because I'm old and opinionated, I always load .223 using small-base dies adjusted per mfg instructions- slight roll-over at the top of stroke. Since I've never experienced issues using this method, I have no clue as to shoulder measurement. If it ain't broke, I'm not gonna fix it.
Loren

This late in the game--- That's where I'm at.
It's real easy to overthink, and split hairs with a lot of this stuff, and I work pretty hard at not doing it.:bigsmyl2:

[Wolfdog91]

AR chambers tend to be rather generous and forgiving.
If they cycle and chamber up OK, I don't worry about it.

Mines piping them out fire formed at a average of 1.458 if I remember correctly. I'd have to check my notes 1.453-1.456 is it's happy place but just picked 1.454 as my target

[Winger Ed.]

I'd have to check my notes 1.453-1.456 is it's happy place but just picked 1.454 as my target

If your reloads are within case length, under max. pressures, are a good OAL, chamber up OK, and are accurate--- you're good to go.
Don't over think this stuff.

[charlie b]

Ditto.

Unless you are making ammo for someone else to use, just make sure it chambers ok in your gun(s). I have never measured a shoulder distance on any cartridge. I have adjusted dies to just close the bolt on a rifle. Some cartridges it is required, eg, the .30 Herrett.

[BK7saum]

I bump shoulders 0.001-0.0015" on bolt guns and 0.002-0.003" for autos. The shoulders have gotten work hardened and springy. An annealing will fix the problem and the shoulders will bump back to where they should.

I measure the fired headspace using a comparator and keep a record for each rifle i load for so i can load ammo that will fit regardless if i have the rifle in my possession or not.

[tmanbuckhunter]

As stated, you're experiencing spring back. Just anneal them.