W 760 is gonna be your Huckleberry in the WSMOffer the following info on 300WSM with the 162 AH. I used what powders I had on hand and never really did get the velocity bump that is prevalent with the AH but probably didn't find the right pixie dust.
Remington 700 - MagPul Stock
26" Preferred Barrel - 5R - short throated to bottom end of SAAMI for my short 2.900 COAL limitations () to help minimize jump.
Federal 215 Mag primers used in all loads
Pro Chronograph optical chronograph 15' from muzzle (measured) - with light shields
No accuracy testing just trying to find a velocity node to start with going forward.
I am conservative in pressure stops, I stop when I see ejector or even slight bolt lift pressure.
62.0 = 3030
63.0 = 3079
64.0 = 3129
65.0 = 3182 - slight bolt pressure STOP
57.0 = 3030
58.0 = 3072
59.0 = 3137
60.0 - 3182 - moderate bolt lift pressure - STOP
58.0 = 3051
58.5 = 3072
59.0 = 3093
59.5 = 3127 - very slight bolt
60.0 = 3144 - very slight bolt
60.5 = 3144 = moderate bolt - STOP
I went a little further than I normally do with this load.
65.0 = 3100
66.0 = 3152
67.0 = no velocity?
68.0 = 3244
This shows more promise and had an extra 4 pieces of brass from a lot to use up so I need to go further with this powder.
61.0 = 2989 - no clue
62.0 = 2989 - no clue
63.0 = 3155
64.0 = 3167
65.0 = 3205
66.0 = 3244
66.5 = 3284 - moderate bolt lift - STOP
66.0 = 3300 - moderate bolt lift - STOP
So I guess I started a wee bit high for RL-17 but thought it should have been fine based upon my RL1-17 load for the 166 HH.
So after all of this I really didn't see the huge gain over the 166 HH where I get 3250 with RL17 without pressure at all. In fact, I topped 3300 with RL17 on the 166 as well. I still have to do some more work with W760 to see where it tops out but it is hunting season and even this data is over 1.5 months old, just didn't have time to sort through it. I hope to get back at it after January 1st plus will have range to myself when it is 25 degrees!
I like RL17 as well, You can't go wrong with either one of themBB: I plan on running W760 a little further based on what I saw. But the 166 HH shot really good at 3260 with RL17 so not sure what I will gain. But just can't leave that loose thread hanging! Just got to pull on it some more.!
Shep,I think you got the idea. But start pressure is relatively small compared to the charge pressure. Sometimes a little starting pressure can help ignition and lower your sd. That's why I started to jam the bullet ever so slightly. I will probably bring it off the rifling and check the sd to see if it's even needed. These bullets are very hard to jam. I'd rather not have to push on them so hard to close the bolt if I don't have to. My 140s and 147s should see a nice bump in speed now too. Plus everything will fit in my mag box better. The gap4 reamer had a pretty short throat on it and I had lots of room left. I bumped it out another .075 after measurements of all my loads. I'm running an extended wyatt box.
Check posts by "GLTaylor" in the "Reloading" section for load experiences using AH bullets.Rl26 is great in the Creed with 140 to 156. But the 123ah is going to need something much faster. I haven't played with the 123s in my creeds yet. But there is a data page drifting on here somewhere.
Lisbon,Rl26 is great in the Creed with 140 to 156. But the 123ah is going to need something much faster. I haven't played with the 123s in my creeds yet. But there is a data page drifting on here somewhere.
I have both the AH 140gr. and the 155 gr bullets. My 140 gr. load using H100V is 61.0 grs. and for the 155s it's 57.5 grs. Using new Petersen brass and Fed. 215 Gold Match Magnum primers. Best of luck working up loads. Definitely use the "ladder" method to check for pressure signs.Which AH bullet and load are you using for the 280AI? I have some h100v and would like to try it in my 280ai