Sounds like a neat project--I doubt anyone was questioning relavence, I just think no one really knew--anyway, interesting numbers on the 44--i am considering the same project in the future.
Im going next weekend to pick up my 223 can made by Advanced Armament Corp. Only 3-1/2 months wait here in the USA!! [img]images/icons/wink.gif[/img]
I thing the Gen II mil-dot from premier reticlesHERE
might stay consistant with magnification. If not im sure they can help you with what you're looking for.
On a cheaper note Simmons made (may still) a 4-12? Diamond Mag scope. the reticle magnified with the power--it wasnt mils but it had holdover marks.
Also i think the springfield armory scopes do that also--nevermind, 56mm obj.
Also, leupold makes super high rings for the ruger i believe. If you haven't looked at them, they may get you a little more room.
Premier Ret. can probably fix you up though.