I recall the RL-15 Alliant data, which has been repeated in this cartridge, even using magnum primers at the 59.5 gr. charge; the late Finn Aagaard used it in Handloader. Of course, he hit the published VELOCITY for the 250 gr. bullet.

In two particular 35's I've toyed with, 56gr. of RL-15 has been max over 3 lots and 15-20 lbs of that powder with 5 diff 250 gr bullets.

One should also note RL-22 charges for the 338 Win.and all bullets listed in that manual. I have hit those speeds, but NEVER those charges!

Agree with JB (big shock) use your chronograph. If you are getting speeds not published in ANY manual, better put on a welding mask when you shoot....the last imprint may not be on cartridge brass.