Enough room for rl23 in a short action?I strongly suggest rl23, I've gotten over 2900fps with the 200.20x with Norma brass in a 22.5" 1:9.5tw wsm built on a Tikka, I'm freebored for 215s so the 200.20 is WAY up the neck touching. I've found good accuracy 15k,35k,45k and 90k off lands with the 200.20x 90k off lands has the bearing surface just above nk shoulder junction.
They talk about mag length in the podcast they did with Ryan and Tanya. It's towards the end but there's some good info on there about all their actions.I wanted to build my supressed 6.5saum on a bumblebee, but Bat never could give me a solid answer if I could install a bainey or CA 6.5 prc box that would allow me to get 3.05-3.1 coal loaded. I know Whaley will cut on anything so maybe he could shed light to that. He opened my helios for 4" wyatt's box quite easily.
Loaded me up some Berger 200x20 with IMR 7828ssc and VV570. The 570 didn't hit 2600 fps with the max load. The 7828ssc went 2848 with mild pressure signs. I need more rounds and some ten-shot groups to confirm but I think we are off to a good start.
I don't like RL 26. It had very weird temp spikes for me. I will be trying some VV-568 and ADG brass when it comes out.
This three-shot group was 68 grains of 7828ssc, all three shots were 2848. I guess @Unknown Munitions knows how to load bullets
Try Hybrid 100V, N560, or Superformance, works REALLY well in my 22" 300 Sherman Short Mag.I believe so, it compresses well too.