I agree with all of the others. In general, I believe that things should be done "right", meaning that if it's a Lehigh and Lehighs typically had 1.5" muzzle caps, that you should probably try to imitate that, but sometimes we get carried away by trying to make everything perfect. If you choose to go with .25" less on the cap, I seriously doubt that many people are going to call you on it. If you go with the "standard cap" and the barrel pin is a quarter of an inch away, again, who's going to see that on the range or while you're hunting and point it out? I suppose good planning avoids many or most of these mistakes, but we're all human and we all make them. Either shorten the muzzle cap, plug and replace the barrel pin at the appropriate location (pain in the neck from where I'm standing) or leave everything alone and accept that your barrel pin is probably a bit closer to the muzzle cap than you would have considered ideal. Life goes on. If this is the only mistake or issue that you have with the rifle when you're done, you're considerably better at this than I am.