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22-243 with 1/14 twist

criticalbass

Private
Minuteman
Mar 11, 2013
1
0
Oklahoma
After a lot of searching, I haven't found much in the way of loads for this rifle. Problem seems to be that most folks use a much faster twist.

The reason I have the rifle in the 22-243 chambering with a slow twist is that it started life as a 22-250. I bought it from a descendant of an alleged gunsmith and it had a bunch of problems that my smith sorted out. He did not, however, cast the chamber, assuming that it would be okay. So I take it to the range, sight it in, and it shoots pretty well. Sub dime sized group at 100 yards with commercial 45 grain bullets on the first trip.

Time to do some reloading. Cases were so oversized that it was like extreme case forming, and after resizing the brass grew in length by about .040! So I look at all my books to see what larger chamber would be suitable, and found nothing. Called my smith, and he suggested 22-243. Gun is done, waiting for dies from Grafs (boy are they slow).

My plan is to pump light bullets out of this thing at very high velocities. I know barrel life won't be great, but I don't care.

I am hoping someone here can recommend loads in the 40 to 55 grain range for this old Turk Mauser.

The following is unnecessary detail:

I bought this heavy old gun from a guy whose (I think) granddad had "built" it. In addition to the too large chamber, it was initially too short to chamber a round. Smith just touched it with the reamer. Good thing it wouldn't chamber a round, because with the aftermarket safety, you could put the safety on, pull the trigger, take the safety off, and boom, or rather click since you couldn't chamber a round . . . I will say that the old guy picked a nice piece of wood, and the 98 large ring action feeds nicely. Since rechambering the bolt is really smooth.

I am really eager to get this round going. Coyotes are calling. I think this makes 12 different calibers I am set up to reload, but it's my first real wildcat. (Have a .338-06, but Weatherby made that a factory round several years ago.) From what I hear, forming the .243 cases is easy with minimal neck thickness issues.
 
Case capacity of the 22-243 is just slightly greater than the 22-250 AI and 220 swift. You can use data for those two as a starting point.

I've found RL15 to give the highest velocity/best accuracy combo in the seriously overbore 22's with 50 and 55grain bullets.

I've owned four or five different barrels in 22-243, but they have all been 7 and 8 twist.
 
I had a 14 twist a few years ago. I used h414 with 55gr noslers b-tips. I can't find the charge weight in my notes though. I know I was getting about 3900 f\s.
 
I own a sako action that was a varminter 22-250 and have a 22-243 lija 3 grove barrel with a 1:12 twist, shoot 52 grain flat base bergers loves 41 grains reloaded 15 , about 4,000 but could load safely to 4400 FPS. But 800 rounds would be barrel life! so slow it down keep clean and shoot a little longer but i agree rel 15 is great in mine