The Vang back boring & lengthening the forcing cone are primarily for buck/pellet pattern improvements, right?
Did/does the Vang comp impact slug accuracy as well?
Thanks
True, the primary goal was to tighten the pattern of buckshot to improve the hit ratio and cut down the probability of an errant pellet striking something we didn't want to hit.
The pleasant side-effect of Hans Vang's improvements is greater slug accuracy.
I helped pattern all of the Department's 870's when they switched over to Vang barrels as well as sight them in at 100yds with Brenneke slugs. We learned a lot about different buckshot and slugs while doing this.
The general rule was that 2 3/4" buckshot loads spread less than 3" loads, and 2 3/4" slug loads were vastly more accurate at 100yds through all shotguns we tested.
Most shotguns we tested (870's & Mossberg 500's) preferred either Federal Premium 00 Buck or Remington reduced recoil (aka "Tactical Load") 8 pellet 00 Buck.
Brenneke 2 3/4" slugs were roughly 50% more accurate than anyone's 3" slug loads, and none of the Forster slugs could match the Brennekes @ 100yds out of a smooth-bore.
Two of us, Ted Smith and myself, shot over 2,000 rounds of buckshot and over 500 rounds of slugs in a week of testing and patterning shotguns.
Once we had done the initial patterning and grouping, the shotguns were issued to the officers and THEY then had to pattern it and make final sight adjustments as part of their qualifications before they could carry it.
Ed
