Not considering doing this.  It's an idea for a story I'm writing.  Thought I'd run it by you guys.

Is it reasonable (that is, safe) to think about converting a beat up No. 5 roller in 7x57 into a coyote rifle with a heavy barrel in .223, set up to use military surplus ammo?

I think one would have to weigh just how dangerous what could go wrong could be if anything did go wrong.

I think I read somewhere that 40,000 psi pressure as an absolute maximum pressure.  For a coyote rifle I'd look at the 25-35, or the rimless 25 Remington cartridges.  Me;  I just left mine in 7mm and load at the bottom of the recommended loads.

George

At the GS at Puyallup many years ago I saw a rolling block, an old rolling block in 6 or 6.5 that chambered a rimmed bottle necked case. It was a very old original outfit. Once in a while I still kick myself for not buying it. 

It's funny how many time bombs are out there that never seem to explode.   

Look out! Look out!!   

The 223 case head is a lot smaller creating less back thrust than the 7 mauser. Not saying it would or would not be safe. There are better combinations for an old rolling block.

I wouldn't do it, personally. But, I'd look at the actual thrust as already mentioned. *AND* I wouldn't chamber it in '223'. I'd use a NATO chamber for use with surplus ball of whatever spec' and origin. And brass is 'one and done'.

I remember back around 1960 when my father contacted PO Ackley to see about rebarreling a Model 5 to a 22-250 which was still a wildcat at the time.  He said he would do it.  Thank goodness my dad didn't follow up or I might be missing some fingers or an eye or two.  I would go with a 219 Zipper if I was building a 22 caliber rifle.  I have a #5 rebarreled to a 6mm/30-30 Improved that I load reasonably for and it had no problem taking an antelope a few years ago.  I wish 25 Remington brass was more available as I really like the rimless cases in my #5 rifles as the rim can get behind the extractor and you are out of business until you tap the case out.  Don't ask me how I know that!  Curt Hardcastle has installed a limit screw on my 50-70 and 38-56 to eliminate that problem.  Tom

waterman wrote on Mar 29^th, 2023 at 5:06pm:

If your shepherd has access to any kind of US ball, have the rifle converted to 9mm or .40 S&W?

As much as I like the antiques, I've decided I'll give the shepherd a Ruger No. 1 with a 26" barrel, the forearm fastened like an original High Wall, and a decent 4-X scope.   

What kind of scope?  No variables.  Good optics & rugged.  A bipod?

All of what he has is military ammo.  Should he have a 5.56 chamber?

waterman wrote on Apr 1^st, 2023 at 6:31pm:


Give him Ruger #3, an "economy" #1. They were available in .223 Rem. Top it off with a 6x Weaver or Leupold. Problem solved.

Just have him buy a savage axis 223 at the local sporting goods store.  Cheaper than a #5 action, and no rebarrel needed.  The $15 scope on it is plenty good to shoot a coyote at 80 yards.  

Might as well give him a cheap expendable rifle, he's going to put it behind the pickup seat with no case, leave it leaning against the wagon in the rain and dew, stick it into a crack between bales in a haystack, use it to pry on a stubborn gate, and similar things anyway.

Been there, seen it, my dad worked on a very large sheep operation running tens of thousands of sheep.  Used to go with him to deliver bread and groceries to the herders in the hills with their bands in the summer.  I don't think I ever saw a sheepherder gun with any finish on it, and that didn't have leather or tin patches and black electricians tape holding the stock together.  Don't remember a scope on one either, but those sheepherders are 55 years older now, probably need one by now.

I remember one complaining that he couldn't hit a coyote with his rifle.  It was missing the front sight, all he had was the rear sight.  The front 6 inches of the barrel was scratched all to hell.  I asked him what had happened, and he told me he had been trying to pry a rattlesnake out from between some rocks.  Absolutely no idea why the hell he was trying to do that.  Probably because he was a sheepherder.

Also remember seeing more than one of them sharpening a knife on a convenient rock, by dragging it back and forth axially over the rough rock edges.  Knife blade looked about the same as that rattlesnake rifle barrel.

Looking forward to the story.

Just remember that in the to-be-written post-apocalyptic story that our protagonist has only access to "All of what he has is military ammo". Makes more sense than the cannon being carried in "A Boy and His Dog". Not to mention that he will have sheep to eat instead of his girlfriend;-)

marlinguy wrote on Mar 27^th, 2023 at 7:06pm:


As I recall, all modern, factory 7 x 57 ammunition is loaded to SAAMI specs. This means it is loaded to a level that is safe in any gun that it was originally chambered for. Sort of like 45-70. Several companies publish reloading data for the 45-70 in levels depending on the gun but factory ammo is loaded for the lowest denominator.

waterman wrote on Apr 4^th, 2023 at 12:29pm:

Given the above, I'd have him armed with an AR 15 converted to a singleshot.

There's several orders of magnitude more ARs out there than Ruger #1s, and in an environment like that, someone will be converting them to single shots to preserve ammo.

Besides, that adds an ironic twist to the notion that "all you need is a single shot."