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the 204 trumps just about any of the standard cartridges including the 220 swift, it will also hold a winddrift advantage over the swift when shooting 40's while still maintaining a trajectory advantage, the only thing the swift does if give you energy on target over the 204. we had a dabate over on AR about this, check out a thread I started
http://forums.accuratereloading.com/groupee/forums/a/tpc/f/6711043/m/558108983
I politely disagree with that statement. I did review your link also. One problem is, although I gave it the published by Hornady velocity nod on my previous reply here. It is well documented that the .204 does not shoot a factory 32 grain V-Max at 4200 plus F.P.S. Many .204's do not stabalize the 40 grain V-Max which velocity is also published high with factory ammo.
The WSSM's are "standard cartriges" at least as much as the .204 is. The .204 certainly does not "trump" them and they can shoot 55 grains and more. If you took a .223 wssm with a lighter grain, the .204 is not even close.......just isn't fact. And thats giveing it the higher than actual velocity.
The other big differance here is. All the other's .223wssm, 22-250, Swift, .243, .243 wssm can whistle 50 some grain bullets so it's more apples to apples comparison at 500 yards. The .204 is giveing up approx.
50 % bullet mass. It's really closer to the .17 Rem (which will also zip'em) than the others. In the link they are comparing Swifts shooting 40 grains and .204's. few people shoot 40's from a Swift. A Swift will shoot a factory Hornady v max 40 grain at the published 4200 fps and higher. A .204 will not shoot a factory 40 grain v-max at the published 3900 fps. According to documentation (not me).
The .204 is likely the best P.Dog rifle going. But, I shoot side by side on a bench at 300 yards with a 22-250 shooting 50 -55 grain and it's not as accurate at 300 as the 22-250 no matter who is behind the trigger of either rifle or rifles. And the .243's are
very accurate at 300. And from 300 yards out is why most buy these flat shooting varmint rifles.
I don't think the .204 "trumps" the others or the Swift and certainly not the wssm's. It may equal some and better
some ...... depending on what you want. But, it does not "trump" the others and frankly with it's lighter bullets is in a differant class of apples.
BTW - before someone get's ticked off at me.
all these type rifles are my favorites. For my area varmints and range, I just prefer the 50 grain and up flat shooters.
You should read very carefully what I wrote, first of all, I never compare the swift with 40grain bullets!!!!! 40grain bullets are not a good overall match for the .224 caliber generally, they just run out of steam too quick, beit 223, 22-250 etc, even in the 223wssm. The BC of the bullet is too low!!! second of all the 223WSSM is a caliber that will soon be defunct it is not going to last, I have not taken the time to see what it can do, but its clear it will go the way of the co co bird, along with the 243WSSM etc. as far as accuracy goes, There is no way the swift is more accurate, the 204 will have flat out less drop at 300yards, at this range we are still only talking about 1.5" of difference. of course accuracy will depend on individual rifles themselves.
As for reloaders not getting the published #'s, again do some research and stop listening to myths, there is a guy who has safely exceeded 4300fps with 32grn bullets. ITs over on the AR forum.
THE 204 IS A FLATTER SHOOTING CARTRIDGE THAN THE 220 SWIFT, I challange anyone to prove me wrong with #'s and ballistic tables, if you can't then quite reciting gun myths and stories