I just ordered 4 pin gauges from .221 to .224. That should cover it well no?
I just ordered 4 pin gauges from .221 to .224. That should cover it well no?
"What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v
the pin gauge isn't going to be able to tell if the chamber is cut correctly...
Ned makes a gage that can tell you if it's 5.56 or not. Much cheaper than the reamer too.
I know that. What I'm trying to avoid is buying an expensive tool that I don't need. So if I pin the bore and that checks out, I know the last possibility is the chamber. I'm 99% sure it's the chamber, but with my luck, I'd buy the reamer and it wouldn't fix my issue.
I would buy the gauge if I ran across a lot of problem barrels, but I just have the one.Ned makes a gage that can tell you if it's 5.56 or not. Much cheaper than the reamer too.
Last edited by markm; 02-29-24 at 13:04.
"What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v
There is that metal stuff that you can melt into the chamber and bore to measure what is going on. Can't remember what it is called but it is low temp soft then hardens when cooled. I have an ingot of it but never used it. It is for making chamber casts.
Been there Mark.....
I understand your trying to save money, but Neds' 5.56 reamer is more then worth the scratch! I've found 6920 barrels that were short (probably end of reamer life).
The only way I know of easily (a relative term) finding bore diameter is slugging the barrel. I've done this and it was a real pain; and didn't really help much.
YMMV
SHOOT MORE -POST LESS!!
Thanks, all! Yeah.. I've read about chamber casting and slugging. Both were too much ass ache for me as a non-gun smith. My reluctance is due to the barrel being contracted for the Mil. BUT... perhaps the barrels were rejected for this reason. Who knows the real back story on "over-runs".
Looks like I'm just going to have to get the reamer.
Last edited by markm; 03-01-24 at 08:40.
"What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v
A .219 or .218 pin ought to fit. My bore erosion gage is .220 so it is basically detecting any erosion of the bore diameter to .220 or greater.
If you have a bore scope, and with all the things you do I think you oughta, you can use it to detect a short freebore / throat.
Thanks, Ned. So a .220 pin passing through would be a problematic situation? (nothing to do with my situation, but still interesting)
"What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v
I purchased one of Ned's reamers to use on four barrels and then sold it for almost what I had in it.
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