So, I have a RCBS FL sizing die for my .270 wsm. Which is a Model 7. I bought some 1x brass that I planned to resize and use. My problem is I run the brass through the die and it won't chamber. I've screwed the die past the top of the ram stroke. I've even tried using a feeler gauge between the brass and the shell holder to set the brass up higher (all the way to .017). Still nothing. So I used a hornady gauge to measure one of the fired cases (NOT from my gun) at the shoulder datum. Then I measured one of the cases that I ran through my die and there is no difference. In fact the shells that I ran further into the die (VIA the methods above) are in fact longer at the shoulder datum.

IMO the die is resizing the brass and squeezing it at the bottom causing the OAL at the shoulder datum to actually be longer than a fired case.

My problem and my question: With my RCBS FL die I cannot "bump" the shoulder back. Shouldn't I be able to do that? Shouldn't the die be to a small enough tolerance that it would resize to sammi spec? Is this something RCBS should take care of. IMO I have a "faulty" die. Even if the brass was fired in my gun, it might resize it enough to chamber but after some firings as the OAL at the shoulder grows, eventually I won't be able to chamber a round because it won't bump the shoulder. Also I won't to bump the shoulder at every sizing to achieve repeatable sizing...

Anyone else run into this? Opinions? Im a novice reloader so I need all the help I can get...
Thanks

If the die meets the shell holder at the top of the ram stroke and it still wont chamber then the die is long or the shell holder is out of dimensions. Dies are made to chamber fired rounds in any SAAMI chamber from any rifle manufacturer.

Thanks.
I'm leaning toward the die because as it moves further into the die, via feeler gauge placed between the shell holder and case, the OAL at the shoulder datum gets longer. So my thought is that the case is never hitting the shoulder within the die body...
I hope RCBS takes care of me...

I too had similar 270 WSM problems but with a Redding die. The Redding tech people had me turn the die in deeper so the shellholder was contacting the die as it cammed past TDC. My problem was that the lower part of the case was not being resized enough. After making the change I have had no further problems.

405wcf

What shell holder are you using ?

My RCBS 270WSM dies are similar, but going through my #5 shell holders I was able to find one that would allow enough bump to chamber. I'd just send them back, take a touch off the die or shell holder, or buy some of the Redding shell holders.

It is possible you have a short chamber and a long die, I have a few rifles with the same issue. I buy a few shell holders and use the shim method as you have, if this works, I machine that amount off the top of the shellholder and keep it with that die set.
I have come across WSM cases not sizing enough near the web, this causes the xases to grow much longer in the head to shoulder length.
How much have you adjusted the die past the top of the stroke?
You may need to cam over quite a bit to size the grass enough. If there is a gap between the shell holder and die when sizing a case at the top of the stroke, then true FL sizing is not happening, you need to adjust further down.
Hope this helps.

Cheers.

I believe that a #43 shellholder is the correct one for the 270 WSM.
What were your numbers on a fired case when using the Hornady OAL headspace gauge?

Throw the feeler guage back in the box and screw the die down until you have a FIRM over center on the ram upstroke. The brass you have was not fired in your rifle and must be Full length resized evedently. You will know when shoulder is contacted as you will probably start getting lube dents in the shoulder unless your dies have been recently cleaned. Muddy

Check the shell holder as the slightly rebated rim can hold the case above the bottom of the shell holder.

I would send: the die, shell holder, 3 fired rounds and a chamber cast to RCBS. They will solve the issue pronto and maybe even at no charge. You will end up with almost a custom die. But if the chamber is off on your rifle it would be better to setback and re-cut the chamber instead of altering the dies.

Some very few WSM's had out of round chambers from the barrel getting screwed on too tight. The original rifle may have been one of these check concentricity.

I'm not willing to send all that to RCBS. This is a pretty standard rifle, if it was a custom cut chamber maybe.

I have gone a couple turns past contact on the shell holder with no better results.

I've run the feeler gauge up to .017". This should have told be if I could take some off the bottom of the die and specifically how much to achieve results. How much might a person take off the die? .017" was the largest shim I could get under the case head.

Using a #43 shellholder.

LNL gauge measures 1.774 of a 1x fired case (base to datum)
1x fired ran through the die (set 1 turn passed top of stroke) 1.777

I had the same problem with a 257WSM that I built. I used Redding 270WSM Type-S Bushing dies and necked down 270WSM brass. I ended up grinding down the top of a shellholder and it worked.

Here are some measurements for comparison:
New Rem brass - 1.752"
Once Fired (my rifle obviously) - 1.758"
Resized for my chamber - 1.754"

I'm on my 8th loading with this brass using full power loads. This is some tough brass.

It sounds like your brass was fired in a rifle with a long chamber or excessive headspace. I don't know what the SAAMI specs are so perhaps someone can chime in here.

I think that your expander ball is dragging also which is why your resized datum measurement is longer than your once fired measurement. You may try lightly lubing the inside case neck prior to resizing and see what happens here.

You said that you went a couple of turns past shell holder contact with no better results. At that deep of an adjustment I wouldn't think you could even cam over the press. Try backing out the die then screwing it down to just make shellholder contact with the ram in the fully up position. Set the lock ring there and give it another shot.

I wouldn't go grinding anything off of the die.

Have you ever used this die before? Is it a new die or did you pick it up used? I would try some new brass and see what your results are. Do you have any brass that has been fired from your rifle?

Now I recall what worked for me. The standard magnum #5 I think shell holder didn't work. I found instructions on champfering it to fit WSMs but didn't want to ruin the holder. Went to get another and Lee had just produced the WSM shell holders so I got one. Turned out to be shorter in height than the RCBS and worked fine.

Might be an easy fix for you too.

Wsm brass can be a bitch to work with, a $35 hornady head space bushing kit should be a "must" for anyone wanting to reload for it. And a ground top shellholder should also be standard equipment. Knowledge on annealing finishes a tight 3rd place! Don't ask me how I know these things!

What kind of press are you using?Some presses will not cam over.Had the same problem till I switched presses.

I'd buy some new brass.

Did you measure the length of the cases to see if they need trimming?

One thing about grinding off the top of the shellholder, shellholders are a whole lot cheaper than dies. You can grind the one you have on hand and know real quick if it helps, ( I'm betting it will). Last time I bought one they were just a few bucks. Also as far as getting new brass is concerned, good luck. I just bought 50 once fired from a fellow Fire member, haven't yet sized any but if I have trouble the shellholder trick will be the first thing I will try.

Make sure you mark that shellholder so you don't run into an excessive headspace issue if that shellholder will work in any other caliber.

To the OP: Send 5 once fired cases from YOUR rifle with the shellholder and dies to RCBS and they will fix it free no questions asked. You will then have a die that fits YOUR chamber and your brass will last a long time.

Called RCBS. They said they run into this "all the time" with the short mags. "Typically they are tight".
Sending 5 fired cases with the die is a solution. I may well just turn the die body down. Anyways they said that it's quite typical with the short mags.

Also as someone mentioned a press that will cam over is best if not required for RCBS dies, according to the tech. They told me to buy an RCBS press to use with their dies. I laughed and informed them I would just purchase Redding dies and be done with it.

As far as for what I was seeing with the measurements anomaly. They concurred with my conclusion that the further the brass was run into the die the base was squeezing the web and lengthening the brass. Since the brass wasn't touching the shoulder of the die body and stopping, it just kept growing...
Thanks for the help

Good luck with the Redding dies. I have a 270 WSM set that doesn't get used because they dent the hell out of the shoulders - Redding doesn't think they need to drill a vent hole like all of the other die manufactures do. Yea yea yea, I'm using too much lube, try imperial wax, etc, etc, etc. Funny how I don't have any shoulder dent problems when using RCBS and Forster sizing dies. To each his own.
Glad RCBS helped you out. Keep us posted when you get the die back and let us know if it solves the problem.

will do. I haven't had any problems with any of my redding dies. They are all bushing dies though. Eventually this will become a 25 pronghorn so I'll need the bushing dies anyways...

Welcome to the world of wsm/wssm reloading. Bumping shoulders back sounds easy, but not so easy with these. In my experience Federal brass seems to be the easiest to work with. Nickel Winchester is the toughest. Good luck !