Search:

Have quite a few other sizes for potential trades, too...

mhb - MIke

Thanks, Maven!

That's exactly the sort of info I was hoping for.

mhb - MIke

I need a mold to produce a .625" roundball in pure lead, but have been unable to find one. Tanner (in England) will make a mold in any diameter I order, accurate as to cavity diameter to.001", but...

but the American-made Stoeger Luger is a .22, with a straight blowback action and false toggles for cosmetics. The Erma Lugers (.22 and .380) have toggles much like the true Luger: the parts are not...

for .455" bullets in the Webley revolvers. I shoot both a Mark IV and Mark VI which were altered for .45 Auto, and have measured a good many more - the chamber mouths are quite uniform at .450" -...

and measured a number of original .50-70 rifles, Springfield, Springfield/Sharps and Rolling Block (Remington and Springfield). As a barrel maker, I have the means of accurately measuring the...

Thanks, all. for the info. I'll check it out.

mhb - Mike

Thanks, Chris - that might work. It is currently shown as out-of-stock, but backorders are O.K.

mhb - Mike

Over the years, I've owned a number of original .50-70 rifles (trapdoors, rolling blocks), and shoot them.
BUT...
The groove diameters are all over the map - on the large side. Whereas the...

I think you are pointing to the importance of stress (or lack therof) in the finished barrel - and I agree that it is important both in the manufacture of, and performance from, a rifle barrel.
...

I think you are pointing to the importance of stress (or lack therof) in the finished barrel - and I agree that it is important both in the manufacture of, and performance from, a rifle barrel.
...

IIRC, was made (by Pope) from a lathe - I don't recall that it was hand-operated, and think it unlikely - but it should have made no difference whether the cutter was power driven or pulled by hand. ...

IIRC, was made (by Pope) from a lathe - I don't recall that it was hand-operated, and think it unlikely - but it should have made no difference whether the cutter was power driven or pulled by hand. ...

Harry Pope credited his lead-bullet rifling form to George Schalck (who almost certainly did not invent it, either). It would be difficult, if not absolutely impossible, to dream-up a rifling form...

Harry Pope credited his lead-bullet rifling form to George Schalck (who almost certainly did not invent it, either). It would be difficult, if not absolutely impossible, to dream-up a rifling form...

The P&W sine bar machines have been the backbone of cut-rifled barrel making since , well, a long time ago. There are CNC rifling machines in existence, and working, but they DO NOT MAKE BETTER...

The P&W sine bar machines have been the backbone of cut-rifled barrel making since , well, a long time ago. There are CNC rifling machines in existence, and working, but they DO NOT MAKE BETTER...

Yes, I'm on the hook, but I'm gonna wriggle just a bit.
You have the idea ref. measuring the pitch of rifling: a contact point on a long rod rotates a digital encoder, which records angular...

Yes, I'm on the hook, but I'm gonna wriggle just a bit.
You have the idea ref. measuring the pitch of rifling: a contact point on a long rod rotates a digital encoder, which records angular...

is variously attributed - the Germans apparently did some experimentation with the process before WW2. Remington's Mike Walker is credited with developing the process and instituting it at Remington...

is variously attributed - the Germans apparently did some experimentation with the process before WW2. Remington's Mike Walker is credited with developing the process and instituting it at Remington...

Having been a machinist, toolmaker and barrel maker, I can't agree that the external lapping of a lead screw and the internal lapping of a rifle barrel are at all comparable - I've done both;...

Having been a machinist, toolmaker and barrel maker, I can't agree that the external lapping of a lead screw and the internal lapping of a rifle barrel are at all comparable - I've done both;...

should only be done by the barrel maker, and is practically universal in match-grade barrels made by the various methods in current use. The reason is that lapping corrects inadvertent minor...

should only be done by the barrel maker, and is practically universal in match-grade barrels made by the various methods in current use. The reason is that lapping corrects inadvertent minor...