Ryan,
I had pretty much exactly the same goals/reasons as you state for building my .20-250. Super flat trajectory, minimal recoil, decent energy etc. I'm totally pleased with how the project turned out. All of my goals were met or exceeded. The rifle is accurate, shoots just incredibly flat, hammers coyotes down to the ground with some ferocity, and recoil is very mild (I see my shots impact through the scope).
The .22-243 was on my short list too. I've had experience with it in the past and know it's a good cartridge to work with. In the end though, it was the recoil issue that decided me against it.
Biggest fly in the ointment I see with your thoughts here, is the factory Ruger barrel. I'm simply not a fan of paying to rechamber factory barrels in general, but especially not Ruger barrels. Just never been impressed by them. That of course, is totally your call though. The twist on it should be great for what you are looking to accomplish though, same as my .20-250, 1/12.
For Catshooter...
Quote:
A new barrel is required because the factory barrel won't spin heavier bullets fast enough to stabilize them - very expensive dies - VERY short barrel life - fussy to load...
None of that is true.
The factory twist is perfect for Ryan's stated goals for his potential project. Flat trajectory from 300 to 500 yards is all about velocity, not BC. He doesn't want or need to stabilize heavy bullets.
Dies aren't expensive at all. Plain old Type S Redding .22-250 dies with an appropriately sized neck bushing work great.
And, my .20-250 has not been the least bit fussy to load for. Neither have several others that I am familiar with been fussy to load for. Really, aside from the lack of published data, the .20-250 is no more difficult or fussy to load for than any other cartridge.
The 250 fps difference is arguable too. No doubt, much depends on individual barrels and chambers, and exactly which loads at what pressures are being compared. I've seen as much as 500 fps more than a buddy can get with his CZ .204 Ruger using the same bullets. But, claiming 500 fps difference as typcial would be as arguable as claiming only 250 fps. I do think it fair to say that the 250 fps would certainly be on the low end of expected difference, at least.
And, finally, short barrel life is totally irrelevant in this application. But, if it is something that matters to you, then definitely, the .20-250 would be a poor choice.
I'm quite pleased with my .20-250 and it's performance on coyotes.
- DAA