Well, once again in my life I have an itch which has to be scratched.

I've got to get another 10.75x68 rifle made, or something darned close.

I'm trying to locate a donor barrel through the classifieds here at AR, but if I'm not successful, how's this sound?

I take a high quality .416" groove diameter barrel blank I already have, and chamber it for the 10.75x68 case, but use .416 diameter bullets instead of the correct .423" diameter bullets.

Doing that might solve two quandries for me...one would be finally settling on a use for my .416 barrel. Two would be having almost what I really want.

Your positive and negative comments? Suggestions about this possibility other than using YOUR current favourite?

TIA.

It's not very exciting. I'm not feeling the love on this one.

We can make it a little sexier and more interesting.

you are looking at significant money for chamber and die reamers, and then custom dies.

if you "bother" doing a 3.35 or less length 416, do the ruger and load it down

sent you a PM

Actually the 416/10.75x68 sounds fun and unique


SSR

That's interesting info from QL, Mick. I don't think 4350 would be a powder I'd pick as a starter for for the cartridge, though. Probably something more like VihtaVouri N-135, or IMR4895, to get a 100% burn, and about 10,000 or so more psi.

I DO like the 4350 velocity all right. Nothing gentle on the striking end about a 400 grain .416 bullet cruising along at about 2 grand or a little less. Sounds like just the ticket for NA bears, even the really biggies.

quote:

Originally posted by Cross L:
Actually the 416/10.75x68 sounds fun and unique


SSR

Thanks. I thought so too and I really don't have to worry about dies or chambering. Not too tough to make my own.

One of the nice things about relatively short and fat cartridges without a lot of bottle neck reduction at the front end...they are pretty easy to lathe bore dies for, single point style with a boring bar instead of having to buy a special reamer.

And the shoulder area can be made just by grinding down a standard shop reamer to make just a shoulder reamer, not a full chamber reamer. Not too tough and doesn't have to meet a SAAMI standard.

It's not like a standard commercial product one is looking to end up with...just a way to use a .416 barrel and some odd-ball brass, to have some fun.

quote:

That's interesting info from QL, Mick. I don't think 4350 would be a powder I'd pick as a starter for for the cartridge

Just keeping it simple. The cartridge case would not be my first choice either. It’s your money, your project, and I have no problem with it.

Mick - Actually, I was thanking you for running it on QL AND I was adding a comment by way of thinking out loud about the powder. Was NOT intending to criticize you, your thoughts about the cartridge possibility, or any negative things.

quote:

Originally posted by Alberta Canuck:
Mick - Actually, I was thanking you for running it on QL AND I was adding a comment by way of thinking out loud about the powder. Was NOT intending to criticize you, your thoughts about the cartridge possibility, or any negative things.

AC, sometimes my posts are a little short and that makes me sound ugly, angry, nasty but I’m not. AC you are one of my favorite people on this forum. I just didn’t have time to run many powders through QL the other night.

I think the coolest people are machinists that love guns.
They come up with great stuff on the cheap.

Cheers, John

I had a friend (dead now) that escaped from Czechoslovakia when the soviets invaded.He was a machinist.When he reached America+ set himself up to recover what he'ed lost he started to mfg. machinepistols. He told me once,"Do you know what it costs to make a Schmeisser?...$2.50 American dollars."He was retired when I met him but he did have some great stories.

AC

What came of the mildcat project?

I'm starting to think you really need to consider selling this barrel!!!!!

quote:

Originally posted by Alberta Canuck:
Well, once again in my life I have an itch which has to be scratched.

I've got to get another 10.75x68 rifle made, or something darned close.

I'm trying to locate a donor barrel through the classifieds here at AR, but if I'm not successful, how's this sound?

I take a high quality .416" groove diameter barrel blank I already have, and chamber it for the 10.75x68 case, but use .416 diameter bullets instead of the correct .423" diameter bullets.

Doing that might solve two quandaries for me...one would be finally settling on a use for my .416 barrel. Two would be having almost what I really want.

Your positive and negative comments? Suggestions about this possibility other than using YOUR current favorite?

TIA.

AC,

The 10.75x68mm Mauser is an interesting cartridge as well as a very good cartridge using modern bullets. My question relates to the case as high quality 10.75x68mm Mauser brass is really hit and miss here in the USA…mostly miss I believe as the availability is predominately Bertram which means you’re stuck with low pressure or a very sticky case – at least that’s what I’ve read here on the AR Forums.

If you do move to a .416 wildcat, rather than use the 10.75x68mm Mauser case why not use the 9,3x64mm Brenneke case? When necked up to .416 caliber the 64mm Brenneke case will look pretty similar to 68mm Mauser case when necked down BUT you’ll have a case designed for high pressure (PMax = 63817 psi) which the 68mm Mauser case isn’t (PMax = 47862 psi). Another benefit is that you could likely rent the finish reamer and go/no-go gauges to cut the chamber and a .416 caliber neck & throat reamer… In fact I just checked 4-D Products website and the rental costs are as follows - the 9.3x64 Brenneke finish reamer and Go/ No-Go Gauges are $38 in rental fees and $180 in deposits and the 416 Neck and Throater is $26 in rental fees and $80 deposit…so it’ll cost you $64 in rental fees and $206 in deposit fees. Just an option…