I have a Remington 700 BDL in .300 RUM that is having a feeding issue. I had the gun restocked in a MacMillan and it was converted to a blind magazine in the process. The gunsmith added some length to the box so that I could actually get three rounds down. I had no feeding issues until I switched to TSX bullets. When cycling the last round, the sharp tip of the bullet sometimes cathes on the ridge outside the chamber and the scary result is that the bullet is forced deeper into the shell case. This seems like a potentially dangerous situation. I believe the feeder spring is now a bit short due to the mods done to the magazine. Would it possible to rectify this by simply stretching the spring? Is there an aftermarket spring that may resolve this problem?

Thanks!

Maybe, or maybe not. Solutions to feeding issues come in many forms. Best way to find out is to try it. Try stretching the spring which may cause the follower to change angle slightly. The more likely fix will be to adjust the magazine box, slightly changing the angle of the top front which on Remingtons acts as sort of feed rails. Without seeing it, it is all guesswork. Can you take it back to the fellow that stocked it? He should be able to fix it.

Or you could try a slight bevel on the chamber mouth; if it is too sharp it would cause the jam.

I would also crimp those bullets. A nice thing about the barnes TSX is that there are several places you could crimp. A lee factory crimp die would help prevent that bullet from being forced down into the case.

Adjusting your seating depth may also help. I have a 700 that sometimes has the issue you describe and I found that if I seat the bullet a little deeper, the problem is avoided.

Thanks for the suggestions!