I have a Winchester 1917 that is currently a 458 winchester, I'd like to run it up to 458 lott, but the problem is that it binds on cycling. the duck pond was filled at one point, welded. it looks good, but tightened up the bridge.

I know one solution, the best one probably, is to install a guide rib on the bolt and adding a slot to the bridge.

local gunshop recommended two things, one, marking the bolt (dykum, marker whatever) and cycling it, with extractor and collar off, to see where it is tight. if the bridge is the point then use a dremel to relieve it. (this I'm not sure how good an idea htis is)

are there any other options? the first one is pricey, the only person I know that was setup to do it isn't available, and of course this is all about cost too.

I'm not ready to get anything done right now. but in planning I need to know what solutions might work. any gunsmiths around that are enfield experts?

Thanks gents

Red

I'm no gunsmith, but I would start with dykem or prussian blue and see if I couldn't figure it out a little first. markers really don't work well for me.

somebody here said that improper polishing of bolts has ruined more bolts than anything else. that will cause binding.

if all else fails, try a different bolt. I will loan you one to try if you need.

For inside the bridge, you can also mark it with some cold blue if you have some laying around instead of prussian blue.

I've cured all my bolt-binding problems for years by employing a little judicious lapping. I use the garnet compounds on steel since the particles tend to break down and don't tend to embed. I suggest beginning with a few strokes using 600 or 800 grit in a slurry of oil or light grease, then clean thoroughly and go to the next-finer grade for a few more strokes. I end up with 1200 grit and the bolts are often almost as slick as a Krag. I use a half-strength mainspring when lapping the cocking cams and as a result the bolt will snap closed by itself when it's lowered with the trigger depressed. Really puts a finishing touch on a fine custom bolt rifle, just be sure to clean thoroughly after using the lapping compound.
Regards, Joe