Wildcat options for 8x57 IS brass?

[Mojave]

I ended up with 1000 rounds of RWS 8x57. I was going to do a 224-6mm Ackley improved (224 TTHA) or a 6mm Ackley improved.

Tried to make 5,6x57 for my Mauser 66 and even with neck turning they aren't really working.

 

[Castle Rock]

I ran a 260AI reamer in deep to use the full length of 7 mm Mauser cases, it was excellent, can’t see any reason why you couldn’t do similar with a 22 Creedmoor reamer

 

[Mojave]

Oh, I like that!

 

[Mojave]

224-8x57 Creedmoor

 

[nockhunter]

5.6x57 RWS (Mauser), not a wildcat.

Mike

 

[cal30_sniper]

5.6x57 RWS (Mauser), not a wildcat.

Mike

I think he’s asking what can he wildcat with good 8x57 brass.

Running -08 and Creedmoor reamers in deep ends up pretty nicely from a dimensional standpoint. Headspace gets tricky unless you run something with a 40 degree shoulder (like the 260AI mentioned above) that you can use 257 Bob or 7x57 AI headspace gauges for. I’m sure there’s multiple options to deal with that.

224 TTH, 6mm Rem AI, 257 Bob AI, or 7x57 AI would be the primary options. There are also some 6.5 variants based off the Bob AI case. I’ve got a 7x57AI based on a Peruvian 1909 Mauser that’s a heck of a shooter. Every bit of a 280AI when loaded to the same pressures.

I’m personally liking the idea of 224 Vais (necked down and improved 6.5x55) or perhaps a 22 Swedemoor (22 Creedmoor reamer run in to 6.5x55 length) because of the ease of using good 6.5x55 brass, but that doesn’t do anything for your Mauser case supply.

 

[Castle Rock]

I can tell that you have never had any experience with that disaster by the fact that you mentioned it

5.6x57 RWS (Mauser), not a wildcat.

Mike