On my m1 carbine I found the feed ramp with machine ridges on it, full metal jacket ammo would feed well, but round nose it would act like a brake and stop the feed. So after looking at the copper lines that the FMJ would leave it on the feed ramp I used some metal sandpaper to smooth out the ridges and then polished the ramp and clean it then re- blued it, now it will shoot any type of m-1 carbine ammo, Now this I have only found in civilian ones not the military ones. This just if you want to shoot ammo that is not FMJ.
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Other than doing 1911’s this was the most popular “Ramp and Throat Job” I used to do back in the day. Now that you mention it I don’t ever recall doing one on a U.S. rifle but I did a butt ton of Universal’s and AO’s
Cheers,
Craig6
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Hi Craig6
The first one I did was also a universal m1 carbine never had to do any military ones. But I did find a European browning 9mm high power that needed it done and still have it and works really fine and shoot all kinds of 9mm bullets with no hang ups.
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