Greetings,
Perhaps the search is over? I was reading some load tests from 1980 by Bob Hagel in Handloader. He tested loads both in the Remington 700 varmint special with a 24 inch barrel and a Model 788 with a 18.5 inch barrel. His velocity loss with IMR4350 was 150 fps plus or minus a few fps for most of the projectiles he tested including the139 grain Hornady. The early 140 grain factory load was loaded with the 139 grain Hornady and a non canister grade of WW760. It lost 150 fps too.
Regards Grandpamac.
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