A couple of months ago, I had major pitting develope at the neck and shoulder area of the chamber from leaving a soaked patch of Butch's Bore shine in a SS MRC .450 barrel. To get the rifle going again, I just had MRC throw another .450 barrel on it.

So now I have a barrel that was shot just enough to break it in. Any suggestions what I might be able to do with it to salvage some use? I can't think of any chamber that would cleanup the Ackley since it's so blown out in the first place without setting the barrel back at least 1/2"? ?

quote:

Originally posted by PWS:
Any suggestions what I might be able to do with it to salvage some use? I can't think of any chamber that would cleanup the Ackley since it's so blown out in the first place without setting the barrel back at least 1/2"? ?

Either set it back or rebore it for a 470.

That or hang it on the wall as a hard lesson learned.

Hog Killer

send it to me, and I'll take the the blaim for a bad chamber.. and set it back, and put it on a mauser or ruger, and chamber for 458 AR

jeffe

Jeffe,

Is that offer so you can have another 458AR or for me to have one of my own ?

The barrel has the .730" long thread shank and pitch for a MRC1999. Would it fit on a Ruger with a little setback and cleanup the pit on the neck area by rechambering for 458AR?

If that's the case, I might just have to get ahold of a SS Ruger std mag action and get this project started!

That whole pitting fiasco just sucked. I was scrambling to get the rifle done for a Kodiak bear tag I'd drawn this spring. I'd originally hoped to put together a SS 500A2 on a MRC PH but the delays were too much so I swapped my order to a standard long magnum in .450. The barreled action got to me in February, I stocked it with a reinforced a Boyd's JRS, and had all my load developement and barrel break-in done by the of March. Went shooting on a rainy Sunday with lead practice loads and on Tuesday, pushed a rusty patch out of the chamber and discovered major pitting, such that the patch had FLAKES of rust on it and the chamber was ruined. I talked to Butch about it but if I were a monkey and his BoreShine the mulberry tree, he played his roll pretty good. Hogkiller, you're right: a hard lesson learned.

Anyway, I hunted with my .338 (yawn) while waiting for the MRC rebarrel and now I have a semi-useful barrel kicking around. I've been following the AR developements and it was just a timing issue that I didn't put together a SS Ruger AR. Maybe now is the time?

I really wonder if the chamber was ruined. I would have takedn a wooden dowel with some 400 grit emery cloth to it with the trustu Black and Decker and I'll bet it would have cleaned up just fine. Two days worth of rust should not result in really deep pits. Did you bore scope it?-Rob

I was dumbfounded when I extracted the first case and shot two more just be sure I wasn't seeing things.

The raised area on the case necks are at least .007" high after extraction.

Holey shait!!!!!!!!!!!!!!!!!
That is bad pitting! Would not try to polish away that!
It is easy to set back the barrel, if it gets to thin in front of the action, just sleeve it over the chamber area and reshape it to original contour. A good smith will do that and make it invisible. Easy, cheap, good as new!