Originally Posted by J E Custom
Once again. In the interest of safety I am going to brake my silence and throw one more thing out that should put this to bed.
After talking to the reamer manufactures. To get a good, clear answer to this rodeo. I have narrowed it down to one simple thing.
"THERE ARE TWO DIFFERENT GO GAGES FOR THE TWO DIFFERENT TYPES OF BRASS/chambers".
IF YOU INTEND TO USE THE NOSLER AMMO/BRASS IN YOUR 280 AI you must/should use the matching
head space gage for that chamber.
IF YOU INTEND TO FIRE FORM THE 280 rem brass in your chamber you need to use the 280 rem go gage with .004 crush.
There is .014 to .019 difference in the chambers and factory ammo.
Simply put, There is a difference in the brass/chambers or they would not require two different go gages. To use the wrong gage or brass, ammo would/could be dangerous.
In my opinion If you are mixing brass and have gotten away with it, you have been lucky.
Armed with this information, Everyone is own there own.
J E CUSTOM
Jerry thanks for putting in some time here but its really just more of the same. Yes there are two sets of gauges , shown here in the only attempt to prove or disprove the difference that Iv been able to find.
So have they made a mistake?If so how have they got it wrong?
Everything else on both sides is just anecdotal to date.
But assuming there is a difference then using the old chamber will carry possible case head separation risks etc if using nosler 280ai brasss/ammo but if using the supposed shorter saami chamber then any brass or ammo should be a good fit ( nosler) or slightly to long for the chamber (all standard 280rem )so the only issue would be that the bolt may not close?If I understand this corectly using the shorter saami should carry no risk as if the bolt will close on the new brass then it should be held snugly by the shorter chamber and give no case stretch?
None of which should be a substitute for good fireforming practive of course.