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Hi Jon,
When I started out on the two builds I had 125 grain TNT target velocities of 2400fps for the 16" and 2500fps for the 20" in mind.....and hit both using right around 25grains of 1680.....there hasn't been much time to go to the range in the last couple weeks to try any loads other than what are listed in the thread for the 20".....
I've been spending most of my free time re-chambering a couple rifles for friends and another of mine.....I have now hand re-chambered a total of (4) 300-221 and 300 fireball rifles to 7.62x39mmUSA...this project was my first attempt at cutting chambers and have been pretty happy with the results.....it probably took more time to tool-up and cut the
receiver/T-handle bushings out of delrin than it has to cut the chambers.....polymer sucks to cut...maybe it's just my tools???
I have a new/unused chamber reamer and headspace gauge if anyone would like to join in the fun....fair price and no wait....
the reamer that I have been using is still sharper than woodpecker lips....PTG is the stuff...anybody have an idea how many barrels can be cut with a reamer before re-sharpening is needed...
Thanks for the interest and I hope to get to the range this weekend to be able to post more data....
kurtz
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