Heavy bolt lift...what am I missing?

[243winxb]

High mileage brass no longer springs back in the non-annealed areas.

 

[JMayo]

Bump it a little more.

 

[jelenko]

Isn't the question whether the resized brass easily chambers?

 

[RichMoAK]

Bump it a little more.

I'll add this to the list of potential fixes. Thanks!

 

[RichMoAK]

Isn't the question whether the resized brass easily chambers?

No. The question is: Why do some pieces of the same lot of brass that undergoes the same resizing process give very hard bolt lift while others (with larger case dimensions) give easy bolt lift?

 

[jelenko]

No. The question is: Why do some pieces of the same lot of brass that undergoes the same resizing process give very hard bolt lift while others (with larger case dimensions) give easy bolt lift?

OK. Do the ones that ones that give very hard bolt lift easy chamber before firing?

 

[RichMoAK]

OK. Do the ones that ones that give very hard bolt lift easy chamber before firing?

Yes, Very easy chambering. One of my first experiments with this problem was to bump the shoulder down more. I was bumping .002; now I bump .003ish. Bumping helped with easy chambering but did not alleviate the hard bolt lift on SOME of the cases.

 

[Alex Wheeler]

I have seen when annealing too much this can be an issue. I had a customers rifle here trying to figure out a heavy lift problem. His brass gave heavy lift and measured .001" longer to the shoulder than my brass in his gun after firing. His was annealed on an amp, mine was never annealed. I would try some brass thats never been annealed just for the hell of it.

 

[RichMoAK]

I have seen when annealing too much this can be an issue. I had a customers rifle here trying to figure out a heavy lift problem. His brass gave heavy lift and measured .001" longer to the shoulder than my brass in his gun after firing. His was annealed on an amp, mine was never annealed. I would try some brass thats never been annealed just for the hell of it.

HERETIC!

i'll try it though....

 

[Dusty Stevens]

HERETIC!

i'll try it though....

Dont buy into the “i have to anneal every time” hype. Always test then re-test. Dont just do something because once upon a time everybody hyped it up. There was a time when folks used neck dies and hoppes numbah nine to clean with.

 

[RichMoAK]

Help me understand the rationale concerning over annealing.

Given that work hardened brass has more spring back than annealed brass:
Does annealing after every firing (as I do) eventually make the brass so "soft" that it looses its ability to spring back?
T or F: Because over-annealed brass doesn't spring back away from the chamber wall, it "sticks" to the chamber wall (or at least leaves very little clearance) manifesting in a heavy bolt lift despite being within spec.

 

[243winxb]

When the neck/shoulder are annealed, the lower part near the case head gets stress relieved, @ around 400 degrees? Can it be over done? This stress relieving helps avoid case head separations in autos. (Gov. Info.)

 

[JFrank]

High mileage brass no longer springs back in the non-annealed areas.

More likely the opposite as annealing weakens/softens brass.

 

[Konocti's Wigwam]

More likely the opposite as annealing weakens/softens brass.

But it also make the alloy more ductile.

 

[farmerjohn]

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