I have a problem I have never encountered before, I have 2, 22-250's, a 788 amd a 700 varmit, I need to reload for both, and have never had a problem
till I tried some once fired win. nichel case's. they function fine in the 788, but can barely close the bolt handle in the 700. I readjusted the die till the shell holder hit's the die and still hard to close on the 700. I tried this on just sized case's. It seem to be just nichel not brass case's. and only the 700. I can segragate the case's and only use them in the 788, but I wonder what is causing this.

The 700 has a tighter chamber and your brass is stretching just a bit is my call.

Use to have the same problem until RCBS customer service passed on the following tip.

LIft you ram until it is all the way up. Tighten your die down until it hits the ram.
Turn the die down another 1/8th to 1/4 turn.

When you pull the ram all the way to top center, it will have a camming effect. ( didn't know what that was then). It takes a little extra effort to size down completely, but it pushes the shoulder all the way back.

If you are loading the cases hot, your brass is stretching. An Ackley Improved version would cut way down on this, or look to see if RCBS offers their X sizer die in 22/250. I am sure they do

Hope that helps. That was the solution I got experiencing the problem several years ago.

Good luck.

Not to state the obvious, but did you check to see if the cases needed trimmed after resizing? Whether you are using nickel or brass, there should be no difference.

Witness, seafire is right on the money. I'd be inclined to recommend owning two sets of dies.

Since you own two rifles, I would keep the brass separate. It isn't critical that you do, but I think your brass would last longer.

Much has been made of the 788's rear locking lugs, and it could be a factor, but I am also sure the chambers are slightly different.

Owning two die sets would save a lot of fussing.

packrat

What Seafire says is "gospel". Camming over with the press ram can give you another 2 to 3 thousands shoulder setback. If that does not work, check the dimension of the shellholder. It should measure .125 from the base (where the shell rests) to the top. Sometimes I have seen these as thick as .128 which means you cannot get the last .003 sizing of the case (i.e., shoulder bumpback). On a very tight (short) chamber, you would have problems. You can try a different shellholder or mill down the thick one on a wet stone
Ron

Undersized chambers are practically unheard of on a Remington (you can usually toss the cartridge and a couple of cow turds in a Remington, Winchester, etc. chamber and still close the bolt ).

Nickeled brass is a bit springier than conventional cases, so it sometimes has to be sized a bit more. The suggestion to get another sizing die, or alternatively mill a small amount off of the shell holder head will likely fix your problem.

But since cases for two different rifles should never be mixed for best results, having the nickeled brass lets you segregate easily. Take advantage of it and forget about using the nickel in the 700.

I think once you've fired the brass the problem should pretty much go away. But you will still need to segregate your brass. I almost have the exact same situation as you, a 788 and a 700 sporter. I use nickeled brass in the 788 and regular in the 700. Once I have the brass fire formed to each of the chambers, I can resize (neck size) for each with the same die.

All brass was once fired, 20 pieces ave 1.91 inches. The top camming idea is good and will try it, will also segregate brass and not use nichel in the 700. Thanks alot for all the help.