Making the 220 Swift into a 22 CM

[longrange772]

I was reading up on 22 CM and some comparisons against 220 swift. Around the 55 grain bullet they are both pushing it around 3800 fps. The 22 CM really starts to pull away though because the faster twist rate stabilizes (75+ gr) heavier bullets. Components for 22 CM are harder to find and likely more expensive. Couldn't you just order a 220 swift barrel from a custom maker with a 7" twist instead of the traditional 14"twist? I suppose you may run into limitations with respect to case capacity, which you could maybe overcome some by powder selection.

 

[Birch7]

Case length, freebore, and top tier brass availability all seem like reasons to do a 22 Creed.

 

[PinesAndProjectiles]

The Swift has a case capacity of 46.3g.

The Creedmoor case has a capacity of 49.2g.

If being able to fill the case with respectable powders, higher velocity could be achieved with the Creed.

The Creed sounds like the easy button in this situation.

 

[fdkay]

The .220 swift is a semi rimmed case with very limited case availability.
The .22 CM is a modern case.
Barrel life with the CM will be very short.

 

[rope]

Brass seems available, I’ve also been thinking of having a barrel spun-up. It’s an interesting cartridge.

 

[babyguppy]

If money isn't an issue, go the CM route.
You have the rifle and components in 220 Swift, I'd spin a barrel.
I mean, holy Shit
> 55 grain bullet they are both pushing it around 3800 fps.
If you are going to replace the barrel.. add some heat
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