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#5624963 - 02/27/15 07:29 PM How to bump back the shoulder?
ltsheets Offline
Tracker

Registered: 11/12/11
Posts: 633
I'm starting to have some tight reloads in the chamber even after a full length resize. I was told by a friend that maybe I needed to bump the shoulder back a little and it might take filing a couple thousandths off the bottom of the die to do so. I wanted to see if there was another way before taking a file to the die.

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#5624980 - 02/27/15 07:39 PM Re: How to bump back the shoulder? [Re: ltsheets]
DStroud Online   content
Pro Tracker

Registered: 11/02/11
Posts: 1512
Loc: Waco
Are you already Sizing as much as your press will allow... getting a slight cam-over as the handle bottoms out?

If so there can be a couple of issues such as fatigued brass and annealing could solve the problem.

To answer the question yes there are other ways to get there without filing your die. Changing shellholders to one of the Redding that have different thickness is one option.

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#5624990 - 02/27/15 07:43 PM Re: How to bump back the shoulder? [Re: ltsheets]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7112
Loc: Wise Co.
+1

Don't start filing on your die. There are better approaches---ones that will WORK and not screw up your equipment.

In the meantime, DStroud's first question is very pertinent. You may need to screw your die into the press a bit more, but you can only go *so far* with that.
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#5625130 - 02/27/15 08:31 PM Re: How to bump back the shoulder? [Re: ltsheets]
ltsheets Offline
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Registered: 11/12/11
Posts: 633
It is caming over already but is it possible to cam over a little further? I think I'm a qtr turn past initial contact on the bottom of the die if that makes sense.


Edited by ltsheets (02/27/15 08:32 PM)

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#5625144 - 02/27/15 08:36 PM Re: How to bump back the shoulder? [Re: ltsheets]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7112
Loc: Wise Co.
It would only be effective if your press frame happens to be flexing excessively. If you get good, solid, positive contact of the shell holder to the bottom of the die already WHILE SIZING A CASE then pushing harder is not likely to make any difference.
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Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#5625186 - 02/27/15 08:49 PM Re: How to bump back the shoulder? [Re: ltsheets]
ltsheets Offline
Tracker

Registered: 11/12/11
Posts: 633
Yeah I'll take another look at it but I think it's already solid contact. Hmmm

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#5625210 - 02/27/15 09:02 PM Re: How to bump back the shoulder? [Re: ltsheets]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7112
Loc: Wise Co.
Tell us more about the gun, the brass, the dies, the press, how many times fired, how you've adjusted the sizing die, your shell holders, anything at all. Maybe there's a clue we can help you decipher.
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Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#5625219 - 02/27/15 09:07 PM Re: How to bump back the shoulder? [Re: ltsheets]
ltsheets Offline
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Registered: 11/12/11
Posts: 633
300wsm custom on a M70 Pre-64 style action. I think these rounds are in brass that's been shot 3 times. Nickel plated Winchester brass. It's a Hornady lock and load press and RCBS dies/shell holders. I adjusted the sizing die "by the book." If I remember correctly, that is putting the shell holder in the press and adjusting the die until first contact is made, and then another qtr turn so that it cams over. Any of this help?

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#5625237 - 02/27/15 09:20 PM Re: How to bump back the shoulder? [Re: ltsheets]
RiverRider Online   content
THF Trophy Hunter

Registered: 11/11/07
Posts: 7112
Loc: Wise Co.
Doesn't make the light bulb in my head go on (not sure that sucker isn't burned out), but maybe someone else has an answer for you. More info is a good thing.

Just how difficult is closing the bolt becoming?? Is it just a change you've noticed or something getting noticeably worse or already a real problem?
_________________________


Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#5625323 - 02/27/15 10:09 PM Re: How to bump back the shoulder? [Re: ltsheets]
ltsheets Offline
Tracker

Registered: 11/12/11
Posts: 633
What do you mean burned out?? The loads are still safe and usable. Just a little stiff to cycle through.

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#5625354 - 02/27/15 10:24 PM Re: How to bump back the shoulder? [Re: ltsheets]
kmon1 Offline
junior

Registered: 09/27/06
Posts: 21736
Loc: Texas
Several things can cause tight chambering,

I would start by trying to find where the bind/resistance is happening on the case. Color the case with a dry erase marker or sharpie. Chamber it. where it is tight should show some rubbed off. From that we might have a better idea of where to look.
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#5625356 - 02/27/15 10:26 PM Re: How to bump back the shoulder? [Re: ltsheets]
DStroud Online   content
Pro Tracker

Registered: 11/02/11
Posts: 1512
Loc: Waco
Sounds like the brass is just springing back a little and if you are sizing as much as you can then not much you can do. Personally I would not be too concerned unless they are tough to close.
You could look into these to see if that fixes the issue. Of course annealing can work wonders but not real sure about Plated brass

http://www.midwayusa.com/product/319992/...=ProductFinding

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#5625363 - 02/27/15 10:29 PM Re: How to bump back the shoulder? [Re: ltsheets]
Buzzsaw Online   content
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Registered: 06/29/11
Posts: 9504
Loc: Frisco, Texas
Does it do this with brass cases? I never had luck with the nickel

Everything else sound kosher, maybe turn the die down another 1/4 or 1/2 turn.

Not sure if the pre-64 action has anything to do with it. WSM case is kinda different for a pre-64??
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#5625369 - 02/27/15 10:34 PM Re: How to bump back the shoulder? [Re: ltsheets]
RiverRider Online   content
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Registered: 11/11/07
Posts: 7112
Loc: Wise Co.
Originally Posted By: ltsheets
What do you mean burned out??



That was a reference to the light bulb in my head, which may or not be serviceable at this point.
_________________________


Originally Posted By: Ronald Reagan
It's not that liberals are not smart, it's just that so much of what they know isn't so.

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#5625372 - 02/27/15 10:35 PM Re: How to bump back the shoulder? [Re: ltsheets]
ltsheets Offline
Tracker

Registered: 11/12/11
Posts: 633
The only brass case reloads I've shot are from once fired brass and they cycle perfectly. I didn't notice them getting tight until they'd been fired 3 times if I'm not mistaken. It's a pre-64 style action. The rifle started as a Win M70 Ultimate shadow in 300wsm and I used the action to get a custom built.

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