Originally Posted by cabelas90
ive never heard of a dasher? but what i want to acomplish is something rare with that in mind i still want to be practical my thoughts have been leaning to look for around 4000fps with a 55 grn bullet in 20 cal ive hear that the 204 ruger has around a 5000 round barrel life pushing 4000fps and looking at case capicty its not jus a ton more with the 243 if you sit down and reallly compare case size atleast why ive leand that way would be because of componits being so availble like brass and such i really am glad for any input i dont reload for much but i like to tinker! what about 243wsm? the 6.8spc isnt much more than a 223 necked up wich is close to a 222 case so i wouldnt gain anything there?
I think 5000 rounds thru a .204 barrel is pushing it. The vortex of the flame pathe is very close to the end of the neck, and I'd say 2500 rounds at best and yet still shoot tight groups.
The Dasher case is nothing but an improved 6BR case, and will hold three or four grains more powder than the .204 Ruger case. The SPC case is shorter, but much bigger in diameter. Another one to think about is the old 35 Remington case shortened to about 1.75" in length. It's a .450" diameter case, and should give you a lot more capacity (if you can use that much). The 6.8 case is pretty much a shortened and rimless .225 Winchester. There is also a 20PPC, but how it shoots I don't know. How about the .220 Swift case shotened to about 1.95" with a .25" neck and 35 degree shoulder angle? That ought to flat smoke a .204 Ruger on paper. Cases are easy to come by, and the bolt head is not a serious issue. Even a slightly shortened 22-250 improved, necked down to 20 caiber is gotta be one to think about ( 1.375" shoulder/ 1.812" oal/ with a .250" neck). I think it'd at least push the 55 grain bullets to 3750fps, and be far easier on the barrel.