Range report - .257wby & .340Wby

[444shooter]

Got out to the range today and seem like I found a good load. Even though I was covered in aphids, still shot a nice grouping

Next up was the Accumark .340 shooting Wby factory 225gr. Bottom shot was my fault. She is a tackdriver for sure. Reloads are going to be next....

 

[dan belisle]

My 340 regularly gives me clover leaf groups with a healthy dose of RL22 and 250 Gr Speers, at 2940 fps. - dan

 

[prosper]

Two of my most favourite ever cartridges!

I have a P-14 based custom in 338 win mag that I was considering re-chambering to 340 (or perhaps 338-378 )

 

[dan belisle]

The 338-378 is a fair bit of fiddling to get it to feed in a P14 Prosper, but the action will certainly take it. The 340 should just be a ream job, I think, I'll have to check a couple of cases and see where they meet dimensionally. - dan

 

[prosper]

The mag box in a p14 is too short for a 340. So the action will require some opening, and a larger mag box. Not too complex a job, esp. since it already needs fine tuning to feed 338WM's anyway.

 

[444shooter]

My 340 regularly gives me clover leaf groups with a healthy dose of RL22 and 250 Gr Speers, at 2940 fps. - dan

I truly believe it is the best all round caliber. The Accumark is such a pussycat to shoot. Do you have any other loads that work for you?

 

[dan belisle]

The mag box in a p14 is too short for a 340. So the action will require some opening, and a larger mag box. Not too complex a job, esp. since it already needs fine tuning to feed 338WM's anyway.

Good point Prosper, I've had pretty good luck with the mag boxes that Numrich sells (in a 375 Wby and a 450 Ackley). I have another here that is being used in a 475 Ackley. I also have a P17 that will end up a 300 H&H, plus a Rem 30 Express in -06 that i haven't decided what to do with yet. I still need a couple of good stocks though. Oh well, so many projects, so little time.

I have some more load data for the 340, I'll have to check my load book at home for it though. - dan