while shooting the lyman 31141 out of my o3a3 at a 10 inch steel plate at 100 yards, to put the shots in the middle of the plate i only have four clicks of elevation left on the rear peep sight. im loading 27gr. of imr 4895 and i think the velocity should be about 1700 fps. i want to shoot at a 15 inch steel plate at 200 yards but i think that i am going to run out of elevation clicks to accomplish this. my question is: is there a lyman globe type front sight that will fit (without major gunsmithing help) to the o3a3 barrel and give me a little help with the elevation that i need? is the lyman peep sight that is available from brownells hard to install or does it require gunsmith work?