Curl,
My 416 Taylor is a Classic stainless Win M70 and the Ruger is an old P14, quite heavily modified.
At one stage I tried a load of AR 2208 (Varget) in the Ruger and got a bit closer, but still not up to Taylor velocities. I'm thinking of trying a bit slower powder again, maybe even AR 2209 (H 4350) but I think it will be too slow perhaps. I've also just got a tin of RE 17, it might be just what I need, also have some VV N540 as well.
The Ruger hasn't fired a lot yet, so it needs a lot more work. I've got the page of load data from Hornady, so need to have a better read of that to see what they found.
A fellow shooter at Dalby has a 338-06 with a Douglas barrel which is a really slow barrel, he has trouble getting to the 3000 ft lb limit for Group 1, mine has a Lilja barrel and gets a lot higher velocities, and Fatboy has one with a MADDCO barrel that seems quite a deal faster again. (Although his is built on a pipe gun!)

All very interesting.

Regards,
David.