Hi guys,
I bought some brass the other day and was talking to a guy at the shop and he says its important to use only brass that has been shot from your rifle, is this true??

No.....this is not true. If one chooses to only neck size it has some merit but once you full length resize it matters not what previous rifle the brass was shot in.

After you full length resize and fire it in your rifle you may get away with neck sizing only.

What vapodog said is true. Full length resizing (not partial full length resizing) will enable that brass to be used in any rifle chambered for that particular cartridge. Of course the load would have to be reworked from scratch if the brass was going to be used in a different rifle.

Now if you're interested in maximum accuracy and you're going to neck size (or partial full length resize) that batch ofbrass, then yes, you'd want to limit it to the rifle it was originally shot in.

Although full length sized brass that has been fired in different riflesshould chamber and go "bang"; I prefer brass that has all been shot inmy gun - with the same load- and reloaded the same number of times. It's not critical from a functional standpoint, but I would consider it important nonetheless.

No, that's B.S.!! What you do is screw your full-length die into your press only as far as it takes to resize once-fired cases down enough that you can close the bolt on your rifle without too much effort before loading up the cases.

The less you work a case, the longer it will last. Some brass fired in a different rifle may fully enter your rifle's chamber without a lot of heavy sizing, and some won't. Test it first, before getting too heavy-handed in the resizing department!!