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223 Vs 22-250 Vs 243... |
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jason miller
Optics Apprentice Joined: February/05/2007 Location: W Laf, IN Status: Offline Points: 229 |
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correction- I was taking a previous poster's word that .224 55 grain ballistic tips were .25, while they're actually .267. This means my 10% statement isn't correct. However, the fact still stands that a .243 55 grain ballistic tip has a slightly higher BC at .276, with the ability to easily push it faster. I would also like to disclaim that my statement that there's no .224 55 grain varmint bullet with a better BC than .276 is from looking previously years ago. I can go look up specifics again if anyone would like.
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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unless a bc is better than at least .1 in any given caliber it doesn't mean squat. whether a bullet varies by .025 would depend more on the velocity it was calculated. Higher bc doesn't have anything to do with pushing it faster, and increase in 100-200 fps in the lower bc bullet will more than make for up for the approx. .025 better bc.
The 69 thru 90 gr .224 bullets are used, they break thru the .4 bc barrier, and while over all velocity is slower the windrift is less.
If terminal muzzle energy is your primary concern-thats a different topic. I shoot my 6mm with the 58s at 4200 fps. , but it still doesn't beat my swift. If barrel heat, cost of shooting and equal performance to say 500 yds is the concern, the 204 wins.
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tjtjwdad
Optics Journeyman Joined: December/11/2007 Status: Offline Points: 365 |
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Dale,
Out of courisoty, what bullet/barrel twist combo are you using in your Swift? The reason I'm asking, I'm in the process of getting a 22 cal 8-twist barrel (I have a butt-load of heavy bullets) and I'm having a difficult choice between the 220 Swift, 220 Swift AI, 22-250 or the 22-250 AI. All have their advantages/disadvantages.
It would be switch barrel set up where if I wanted to change I'd just unscrew the barrel, and depending on powder differences, re-zero (which should only take a cople of shots because only the barrel is removed. The action, stock and scope stay intact). and start shooting.
As far as the ongoing 243/22 cal topic, I feel it comes down to what the purpose of the rifle is. The heavy bullets and fast twist have really bought the 22 cal into its own but to the same extent, it has for the 6mm too. On the other hand, if one goes to far in the fast twist direction they prpbably won't have optimum performance for the bullets on the other end of the spectrum due to them coming apart and/or decreased velocity due to more barrel drag.
Thx,
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Blackbird
Optics Apprentice Joined: February/10/2007 Location: United States Status: Offline Points: 284 |
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Dale Clifford
Optics Jedi Knight Joined: July/04/2004 Location: United States Status: Offline Points: 5087 |
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my swift is 1-14 which is one reason for such high velocity. Tikka makes a 1-8 twist 223 also. heavy bullets in 6mm work well, with fast twist also, very high bc.
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tjtjwdad
Optics Journeyman Joined: December/11/2007 Status: Offline Points: 365 |
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Thanks,
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