I have an old 20 MOA mount I am debating recycling onto a SPR type build with either a 14.5" or 18" high-end barrel. Are there any advantages or disadvantages to running a 20 MOA mount on a 223/556 platform? Seems kind of pointless to me since I probably won't need the extra adjustment range with that platform but I'm a newbie so you guys tell me. Thanks.