22 conversion kits

[John Sabato]

I have never seen one made for the .30 caliber Luger... Could you please post some photos of your two kits??... I would bet that the barrel for the .30 caliber conversion must be pretty darn slim! .311" for .30 caliber, minus .224" for the .22LR, sure doesn't leave much metal thickness for the barrel sleeve, eh !

[hayhugh]

Will post photos when I get back to Fl. next month.

[ithacaartist]

Originally Posted by John Sabato

I have never seen one made for the .30 caliber Luger... Could you please post some photos of your two kits??... I would bet that the barrel for the .30 caliber conversion must be pretty darn slim! .311" for .30 caliber, minus .224" for the .22LR, sure doesn't leave much metal thickness for the barrel sleeve, eh !

I have only heard mention of the .30 Luger variety, and vaguely recall reading something about it's fitting both calibers. As you point out, its walls would be pretty thin, and I also wonder what it would do under pressure of firing. I think it would be OK snugly installed in a 7.65 mm bore, as it would be supported, at least by the lands in the bbl. But an unsupported, skinny wall? This question is certainly justified--40-45 thousandths ain't much! The kits were more popular in Europe, I think, in part because of restrictions on the number of pistols one can own in certain countries. I hope Gerben and Mauro see this and have an answer.

[sheepherder]

Originally Posted by John Sabato

I have never seen one made for the .30 caliber Luger... Could you please post some photos of your two kits??... I would bet that the barrel for the .30 caliber conversion must be pretty darn slim! .311" for .30 caliber, minus .224" for the .22LR, sure doesn't leave much metal thickness for the barrel sleeve, eh !

I get .043" wall thickness for the 30 barrel insert...No reason it shouldn't work, I'd think...It would be supported full length...And not all that much pressure...

But these 'kits' are definitely ugly when installed...

(A paperclip is .035"...Add two thicknesses of lined notebook paper and you've got .043")...

[ithacaartist]

Originally Posted by sheepherder

I get .043" wall thickness for the 30 barrel insert...No reason it shouldn't work, I'd think...It would be supported full length...And not all that much pressure...

But these 'kits' are definitely ugly when installed...

(A paperclip is .035"...Add two thicknesses of lined notebook paper and you've got .043")...

Rich, thanks for tightening up the math--I did the subtraction and did an estimate of the half. Theoretically, it would be a bit less if you're measuring the bottoms of the grooves. And .035, to me means MIG wire! I know the rest of the action of one of these probably wouldn't hold up for very long using them, but if it were the 6" liner, would you worry about running CCI Stingers through one? This round is responsible for three broken front toggles on three different 60s' Erma .22s.

[sheepherder]

Originally Posted by ithacaartist

Rich, thanks for tightening up the math--I did the subtraction and did an estimate of the half. Theoretically, it would be a bit less if you're measuring the bottoms of the grooves.

You are right - I used John Sabato's dimensions. D'OH!!!

I get ..299" [7.6mm] for my 'insert diameter' (actual measurement). And with .224" bullet diameter [bottom of groove], that gives .037" wall thickness for the 30 cal insert.

Paper clip thickness.

BTW: Here's a pic of the 9mm/.22LR conversion 'kit' that I dug up somewhere, showing all parts.

[sheepherder]

Originally Posted by ithacaartist

...would you worry about running CCI Stingers through one? This round is responsible for three broken front toggles on three different 60s' Erma .22s.

I usually only shoot Remington 'Target' 22LR, bought by the brick. Because of the ammunition freeze, I could only get Remington Viper Hyper Velocity 22's, which my Ruger does not like. But even with that, I could only buy 2 boxes [100rds]. My LGS still has no ammunition shipments coming in since UPS now charges a Hazardous Shipment charge [$40] IN ADDITION to their regular shipping charges. And the distributors aren't ordering it.

Short answer - I've never tried it.

[sheepherder]

Originally Posted by ithacaartist

...CCI Stingers...

Dave, is there any physical difference in Stinger dimension from a 'standard' .22 Long Rifle??? I am just reading here that the .22 rimfire is the only round with a bullet diameter the same as the case diameter...So the chamber depth is greater than in a centerfire cartridge. To cut a .22 LR chamber you have to add the bullet 'shoulder' length to the case length, minus the rim width...Because the .22 LR headspaces on the inside of the rim...And the headspace is kinda critical because if there's not enough, it goes "brrrrppppppp"...

I'm trying to measure the chamber depth in my .22's but the case wall is so thin and I only have a 7/32" drill bit to slide down the chamber...I can't get a good measurement...Somewhere around .761" is what I get...