What bump gauge do you suggest?
I’m sure there are better ones out there but this is what I use
https://www.midwayusa.com/product/4...headspace-gauge-5-bushing-set-with-comparator
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What bump gauge do you suggest?
Sharpies are handy to have on the loading bench...!fastest method to figure out if a case issue or a bullet issue, take a sharpie and color the bullet and the shoulder. Load the round, and try to chamber, then open the bolt and look. If the marker is rubbed off the shoulder, then you need to bumper that back during the sizing, if rubbed off the bullet and not the shoulder, seat the bullet a tad deeper until you and chamber it.
I've never had issue with fired brass in said rifle for what I am loading (fired from same rifle I am loading for). I have run into issue of not seating the bullet enough for a friend 243 when we changed up the projectile. Just had to re-measure and then adjust seating depth a tad.
New Sako finn light in 300 wm. and only shot one load accurately by gun smith who dosn't no exactly which load it was.(the gun smith does work for Sako.) Leupole scope and rings, i can hit the bull at 200 yards standing freehand with my rugger 308 .
Did you "squish" the shoulder and change the angle ? Sorry don't know the technical terms but early on I had my die turned down too low and was affecting the shoulder angle, rounds would not chamber.
Interesting conundrum, Another thing to look at is case expansion above the belt. I shoot a max load in my 257 Wby. After resizing with an RCBS die following a second firing the brass is hard chamber in my rifle. At that point the expanded brass above the belt was a bit springy and the RCBS die wouldn't squeeze it in enough to set it back. It's possible that that particular FL die was a bad match for my chamber.
I now use a Redding body die and haven't had the problem since, however I have to size the necks in a separate step. Another option I found in my research is a collet die designed for belted magnums that only sizes that section of the case above the belt. I forget the name of the company that makes it.
Good luck and let us know what you figure out.
Which is why every reloader (new or experienced) needs to learn to measure shoulder set back rather than just "turn the die down a little".
chambering problem fixed, now to fix the accuracy ,thank you all for your input.
What was the solution?