Originally Posted by 340Wby

270Roy first smile

He started(RL25) at 77(3404fps) to 86.5 grains(3797fps).
Standard Weatherby AOL used during these tests but as we know Roys have free-bore galore, which can be very useful!

Once cases become too full(higher loads) they where vibrated down on the side of a tumbler.



Originally Posted by 340Wby

OK.
Here is the original load development.
"96 and 99 gr of re25". 150gn = "3650-3800"

3 of my friends now run these sorta loads. Here is some of the latest data compiled by him.
"101gn Re-25 = 3787 - 3812fps". All .5" at 100(3 shots. Mark V).
WITH NO SIGNS OF A HOT LOAD smile

The secret here is to vibrate em down with your tumbler.

Those sure seem pretty hot to me. The Alliant max for the 270 Weatherby with RL25 and a 130 is 72 grns, at 86.5 those loads are 14.5 grains over their max! In the 300 and RL 25 with 150's, Lyman lists 91.0 grns as max and those loads you list start at 5 grains over their max, going up to 10! And using a tumbler to settle the powder? Doesn't that affect the burn rate (geometry?) of the powder?