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Do you have an action yet?I am trying to get together information on the forming process. What does to start with? Looks like I will have to got from 243wssm up I for the life of me I cannot source 25 wssm.
Do I ream out the inner diameter and neck turn the out and call it good and them load as normal in the Redding dies?
Best.
John
No I am tryin To hoard information before I do anything. I'm really excited about the caliber and stepping into the wildcat world.Do you have an action yet?
My 6.5wssm uses 48.8gr of re22 to do the same velocity.
Thank you. Some really good info.John, I have a couple cartridges based off the 243 WSSM. A regular 6.5 WSSM and a 6.5 WSSM Ackley. I really like both. All I do is neck up the 243 WSSM brass to .264 and then turn down the necks, A LONG WAYS. New brass is around .020". I don't remember the exact number, but I turn down to .013" to .014". I do it in 2 steps. I use Redding 6.5/243 WSSM dies for the regular 6.5 WSSM and Whidden dies for the 6.5 WSSM Ackley.
The 6.5 WSSM is my deer rifle and I shoot 140 Berger HVLDs at ~2860 fps. I know I can go quite a bit higher, but they shoot fantastic at that speed. This one uses a 26", 8-twist Bartlein. This Summer I'm going to do some more load workup on it and see if I can't find equal accuracy at a higher velocity.
The 6.5 WSSM Ackley was for F-Class. I had a reamer built for the 155 Cauterucios. They shot very well at 1,000 yards. My fire-forming load was 44.2 gr. H4350 and CCI 250 primers at ~2765 fps. My formed case load was 48.8 gr. H4831SC and CCI 250 primers at ~2845 fps. I was hoping for a little more velocity, but I couldn't get them going much over 2900 fps before I saw pressure signs. I'd still be shooting them today, but Bob passed away, and I don't have enough left for a match. With a .350 free bore I can't find another bullet that will work in it. I thought Berger was coming out with a 156, or something like it, but I haven't heard anything on that for a while. This one uses a 30", 7.25-twist Kreiger.
Finding brass can be hard. For a cartridge that nobody seems to want to touch, when the brass does get made, it isn't on the shelves for very long. The case is like a tank. I can't imagine how that brass wouldn't last you a lifetime, if you treat it right.
Whatever you do, don't go with a no-turn neck. You will not be happy if you're looking for great accuracy.
Yea I'm not after the 40° shoulder version. Just as much of a straight swap to 6.5 as is possible.If you're after the regular 6.5 WSSM, I had Greg Tannel build that rifle for me. I believe he had the reamer and then throated it to match my dummy round, which was the 140 Berger HVLD. I sent him a Winchester 70 Coyote and had him go through everything. He did an amazing job on it.