Toggle not closing question

[Ice]

I recently bought an extremely nice code 42 byf shooter. This is a CAI import with scrubbed proof marks. Since the pistol has matching numbers except for the sideplate I replaced the firing pin, extractor and ejector with repros because the numbered parts are worth something to somebody as they are original.

Problem is, about half the time the toggle wants to stop about 3/8" from closing when chambering a loaded cartridge - in this case RN aluminum Blazer. This sometimes happens when I release the toggle for the first cartridge and sometimes when loading from the magazine. When this stoppage occurs I just slap the toggle down and it chambers the cartridge.

I am wondering if there might be too little space between the repro extractor and the breechface and this is interfering with chambering. The mainspring seems strong enough. It could be the ammo but the other Luger shooter functions perfectly with the same ammo. I have about 1K of the Blazer that I want to shoot up before I start on reloads.

Don't want to start fixing anything until I hear your thoughts. Any comments welcome. This is my wife's first Luger and she loves it so I want it to function properly.

Thanks

Charlie