Don't know if it will help ya much...

I have a 20 inch barrel, with a heavy magnum profile on a Ruger 77 Mk2 action, chambered in a 20 Practical...

Don't think you'll see much velocity loss, if ya do, maybe a click or two on your scopes elevation will compensate for it...

and if you hand load, one thing good about a 20 Practical, is there is still bullets available on the shelves at local stores..

same in 17 caliber... that is why I am putting together a 17 Fireball also...

"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC

“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez