L Cazador Report post Posted October 1 Good news I have all three brands of shell holders and measured height. Lee and Redding are both .248" and RCBS is .244" so you should be able to acheive an additional .004" bump by buying the RCBS. You measure the flat that sits on top of the ram to the flat on top of the shellholder. Do not measure from the bottom of the groove that fits into the ram. Hope that helps. 1 Share this post Link to post Share on other sites
BeardownAZ Report post Posted October 1 47 minutes ago, L Cazador said: Good news I have all three brands of shell holders and measured height. Lee and Redding are both .248" and RCBS is .244" so you should be able to acheive an additional .004" bump by buying the RCBS. You measure the flat that sits on top of the ram to the flat on top of the shellholder. Do not measure from the bottom of the groove that fits into the ram. Hope that helps. Well I will give it a try. It’s an inexpensive attempt at worst. I appreciate your willingness to help out. This forum never disappoints…most of the time lol 1 Share this post Link to post Share on other sites
Azdiy Report post Posted October 1 As mentioned before a headspace gauge should be helpful. Wilson case gage also if made for 270 wsm. Measure the neck OD of your reloads and factory ammo. If you know anyone with a set up for 270 wsm have them size some cases for you and check them. 1 Share this post Link to post Share on other sites
dse Report post Posted October 1 Had this issue on several rifles in 270 wsm. Check the measurement across the web of the case. For some reason winchester brass ends up about .002 over after sizing. I've had a little success pushing it back with a redding body die, still a little tight but will chamber. Also switched from Winchester to Norma brass and never had that issue again. 1 Share this post Link to post Share on other sites
BeardownAZ Report post Posted October 2 21 hours ago, dse said: Had this issue on several rifles in 270 wsm. Check the measurement across the web of the case. For some reason winchester brass ends up about .002 over after sizing. I've had a little success pushing it back with a redding body die, still a little tight but will chamber. Also switched from Winchester to Norma brass and never had that issue again. i'll pick up some new brass and try. I will let everyone know what worked. rifle is getting bedded currently so won't have it for a week or 2 to mess around with. My problem isn't as bad as others that I have read about so I don't think my solution is far off. 1 Share this post Link to post Share on other sites
azsugarbear Report post Posted October 8 Most of the time when I have experienced this issue, it has come down to one of two areas: 1) the brass just above the web has expanded too much; or 2) the shoulder has been bumped back too much causing the shoulder bottom to bump/buldge out. A small base die or thinner shellholder will solve the first problem. Simply backing off the die a quarter to half turn should solve the second problem. Share this post Link to post Share on other sites
