Any 99 re-chamber/re-barrel project should start with getting it to feed out of the magazine, otherwise all the shine goes out of the project.
I have two 99's that feed 219 zipper flawlessly out of 303 rotors. Anther that I got frustrated on feeding the sharper-shoulder rimmed 7-30 Waters.
I gave up trying to feed 375Win from a clip magazine, and screwed the barrel onto a proper rotorary equipped receiver.
There are several life-times worth of experienced counsel here on the 'Fire. The idea of developing a varmint 250 load is only going to take a couple weekends.
How about a 99x .410 repeater?
Last edited by JeffG; 09/23/21.
