happy7
07-27-2009, 09:40 PM
Earlier this year I bought a 40 Xdm In another thread I have talked about my leading issues with this gun, which I think in part is due to the shallowness of the rifling.
But my question here is that I loaded op some of Lee's 175 grain TC bullets to an overal length of 1.13, meaning that about .04 of the bullet was sticking out past where the taper of the truncated cone starts. But cartridges loaded like this would not chamber reliably. I found that only when I seated the bullets flush to the shoulder where the cone started, (OAL of 1.09) that it would chamber easily. By "chamber", I mean "fully chamber". That is the cartridge would not fully enter the chamber. Feeding itself was not an issue. This means to me that the barrel has a very tight throat. The XDm does come standard with a match barrel. So is this normal? I don't have nearly as much experience with autos, as with revolvers loading cast, but do load for 45 auto and 9mm, also truncated cone designs and have never had this problem before. But I would appreciate input from those of you with more experience.
Sized .401 and lubed with speed green.
Sized bullets do measure .401 to .4015
Barrel slug measures .40025 or so. I mean a quarter of a hash past .400 on the micrometer.
But my question here is that I loaded op some of Lee's 175 grain TC bullets to an overal length of 1.13, meaning that about .04 of the bullet was sticking out past where the taper of the truncated cone starts. But cartridges loaded like this would not chamber reliably. I found that only when I seated the bullets flush to the shoulder where the cone started, (OAL of 1.09) that it would chamber easily. By "chamber", I mean "fully chamber". That is the cartridge would not fully enter the chamber. Feeding itself was not an issue. This means to me that the barrel has a very tight throat. The XDm does come standard with a match barrel. So is this normal? I don't have nearly as much experience with autos, as with revolvers loading cast, but do load for 45 auto and 9mm, also truncated cone designs and have never had this problem before. But I would appreciate input from those of you with more experience.
Sized .401 and lubed with speed green.
Sized bullets do measure .401 to .4015
Barrel slug measures .40025 or so. I mean a quarter of a hash past .400 on the micrometer.