I know this a late reply, but instead of Butler Creek caps, I would suggest buying the Vortex Defender caps for the scope. Size E-10 for the eyepiece and O-44 for the front.
Measuring from the front of the installed action, the forend is 11 3/8" long.
I had the same problem as Derrick with the clearance for the hammer spring bar. I hit it with a Dremel tool and the action cycles correctly now. (Ruger receiver with a Kidd trigger unit)