I'll be firing my new LMT CQB for the first time tomorrow. My scope has not come in but I want to zero the BUIS it will wear.
I have a set of the NSN numbered 200-600 KAC BUIS. I bought the rear used and I do not have directions for setting a zero.
I will be bringing LC 55 grn, Win 55 grn (NATO headstamp), Federal 55 grn, and some Nosler Match 77 grn. I intend to use just one of the manufacturers to complete my zero. The rest of the ammo is to release the pent up urges I have had to fire this rifle.
The CQB has a 16 inch 1/7 barrel. I think the Nosler will be the best ammo for the barrel twist but as 55 grn will someday once agin be the most economical plinking ammo (hopefully) I want to zero for that flavor. Is 55 grn a poor choice for accuracy in that twist barrel?
I plan on starting at 25 yards to get on paper. I would like to have a 100 yard zero for the rifle. The rear sight starting elevation is 200. There is also a Z (zero) mark up around 300.
I'm assuming I shoot my 25 yard zero on the Z setting and adjust elevation at the front sight post? Is there an initial setting for the front sight post? Its not like the M16 sight I remember where you start from "flush". The front sight post adjustment ring looks to be alway proud of its base.
Once zeroed on the Z setting at 25 yards whats my best setting to use at 100?
Thank you for any help you can offer.