Fire lapping, I am now a believer

[GaryM]

I've had my whisper now for a few months but I never could get it to shoot very well. 2 1/2 -3" @ 100 yards was the best I could do. I was starting to worry my eyes had reached that stage and precision shooting was a thing of the past.
Well, out of desperation/curiousity I picked up a fire lapping kit (Wheeler brothers kit from Midway) and tried it out.
5 rounds of the 220 grit, 5 rounds of 320 then 5 of 600. Cleaned the bore and ran a dry pacth through, still felt the resistance vary through the bore. I decided I would just run a few patches with the grit on it. 5 patches of 320 then 8 patches of 600. Cleaned it out again and checked with a dry patch, it felt good.
I just got back from the range. Now I am good for 1MOA easily. I only tested at 50yds but I had three rounds overlapping with a fourth opening it to 3/8"!
Needless to say I am quite happy now and I confess I now belong to the firelapping believers club.

Tech info;
16" M4 clone AR w/ Cavarms synthetic lower. Leatherwood qd scope mount.
Sierra 125gr Game master over 19grs of WC1680 (surplus powder) Winchester small rifle primers.
Rifle is a home build with an ER Shaw (M1S) barrel.
Fired off sand bags.