Am building two BPCR rifles on Rem Rolling block 7mm actions. Caliber is 38-50. First GM barrel came out nicely tho quite heavy as it is 1 1/8th across the flats.

Second is another story. While chambering it appeared the bore and external surface were not consistent. Fitted and chambered OK but when I started setting up to turn this one to 1/2 round 1/2 octagon the inconsistency proved to be only part of the trouble. Was a bend in the barrel just where the forearm would end and the round would start. Was able to straighten it some but with the remaining bend and the inconsistent bore to barrel wall thickness I decided to not waste any further machine time on it and keep it full octagon. 

Both barrels purchased from Numrich but at separate times. First barrel shoots very well with little load development. Am VERY interested to see how this second does but I have my doubts it will make the grade.

Andrè

Only by the info from Numrich.  Was advertised and sold as a GM.

Numrich will sell just about anything they can find, lots of seconds. I got a liner from them about 8 years ago and it was full of rust. They buy over runs also and sometimes have very good buys.

I recently had an issue with a GM barrel.  Got it form Brownells,  I had threadded , chambered, all sight cuts etc, basically all done except roll marking. When I tried to roll mark it, the top line of the roll die rolled nicely, bottom line didn't even make a mark. Measured the flats on the octagon, they were not 45 degrees to each other. 

lesson leaned...always double check the barrel before machining...no matter where it came from. 

Mike

We have two prices on the oats we sell.  The expensive ones have not been thru the horse yet.  The cheap ones...
I like to think of them as recycled.

Rich

I have bought all my Green Mountain barrels from Track of the Wolf and have never had a problem.  One 45-70, three 45LC and one 50 caliber black powder.  All great barrels.  Just bought a 40-65 for my Trapdoor Hawken
Triggersmith