Gents,

I may do a re-barrel on a Ruger 77.

I'm planning on doing it to 458 Win.

What twist rate and deep or short chamber should I be looking at for all bullet weights.

Plan on using ER Shaw for barrel and work. Any comments on their work.


Thanks,

Roger QSL

there is some consensus (or should I say contention) here that a long throated 458WM will equal Lott velocities.
Some suggest that chambering for the Lott gives more options. Like buying a 357 and shooting 38spls in it. Let your magzine box oal be your guide.

Rich

long and short chamber is on the chamber, and installing the barrel.

you mean long throated?

long throat on a 458 is good.. and a lott chamber, with the fact that you can erode the chamber (after a billion rounds) is an issue


jeffe

quote:

Plan on using ER Shaw for barrel and work. Any comments on their work

I would go a different direction. For the cost of a Shaw you can get "itd custom" to install a douglas. http://www.itdcustomgun.com/ We ran the numbers a couple of weeks ago Installed and blued for the cost of the Shaw only installed.

Standard .458Winmag chamber with the standard throat is long enough to do anything you want with a standard M77MkII magazine box. You can still single-shot load the .458WinMag cartridge to Lott length in the standard throat, if you have a bullet long enough for that. Then just keep the magazine box filled with standard length .458WinMag. 10" or 12" twist, no worries.

That little bit of extra twist may help and it won't hurt anything.

Just remember to also buy a good strong vise and a pipe wrench so you can make yourself a real reliable 1:10 twist barrel! After you've tried it and assured yourself it doesn't work, why then you can just turn the ol pipe wrench around and correct the bad decision ! -Rob

Thanks all,

I made up a dummy 458 with a 500 grain bullet and the round cycles easily thru the 77's action. The magazine box is just barely long enough for the dummy I made up. No extra work here for the smith.
As to "deep or short" length chamber, still not sure what that means. I'm aware of different throat chamberings, but not deep or short.
I don't want a Lott chambering anyway, just the 458 Win.

Again thanks,

Roger QSL

Roger,
you can buy a rifle pre-threaded and chambered. The concept being that a short chambered rifle jut required finishing (i don't buy that, btw, it's just as much, or more work to make it correct) or long chambered, where CONCEPTUALY no lathe is required.. it's easier and better to generally chamber it yourself (or have your gunsmith do it) and if you don't have the reamer, rent one.

throated is how long the barrel is at or a hair over, with an angle, to lead the bullet into the rifling. The distance from the ogive (caliber diamter) of the bullet to the rifling is called "free bore"..

a long throated reamer has either aLOT of freebore, or you can seat bullets out further, giving you greater effective case capacity.


that help?
jeffe

Your road to hapiness is paved with the North Fork 450gr bullets. Work to get them to feed. This bullet makes a 458wm perform better, meaning more penetration and better wound channel, than a 500gr round nose solid at Lott velocity.

JPK

Just a note that I agree totally with the barrel recommendation. I have never used a Shaw barrel, but some people like them. However, I have had IT&D do a lot of work over the years, and every gun they did for me absolutely shoots the lights out. They are also about the least expensive place going, and turnaround is genereally really good. Can't say enough good about them.