My conversations with Hans tends to lead me to believe that the reason why tactical buckshot doesn't improve because of it's reduced power charge and possibliy the shot cup expanding (leaking) then being constricted back to cylinder bore again towards the end of the barrel.
My personal experience showed a marginal increase in spread of the LE132 buckshot. Understand I'm speaking of minimal degregation of pattern, but it couldn't/didn't make it tighter. However, full power 12 pellet buckshot from S&B was improved greatly. If I remember correctly about 50% improvement and allowed the gun with that ammo to have a 25 yard "B" zone where it had been a 15 yard load with all my other 18 and 20 inch non-vang'd guns.
My guns didn't (except the Vang because of it's short buttstock) didn't fit my wife either. she got a 590 for her birthday and we measured the guns LOP v. her frame requirements. Resulting in a 1 1/2" being taken off in a miter box. I had to drill the mounting holes a little for the recoil pad (yes you'll have to re-shape the contour) attachment , but she's been running it well, pain free since January.
It's an easy fix, didn't cost me anything but some time and made a world of difference in her being able to fire extended strings of fiire without pain (shoulder or face).
When I figure out how to post some pics here I'll show the "rule of thumb" for LOP measurements.
My personal experience showed a marginal increase in spread of the LE132 buckshot. Understand I'm speaking of minimal degregation of pattern, but it couldn't/didn't make it tighter. However, full power 12 pellet buckshot from S&B was improved greatly. If I remember correctly about 50% improvement and allowed the gun with that ammo to have a 25 yard "B" zone where it had been a 15 yard load with all my other 18 and 20 inch non-vang'd guns.
My guns didn't (except the Vang because of it's short buttstock) didn't fit my wife either. she got a 590 for her birthday and we measured the guns LOP v. her frame requirements. Resulting in a 1 1/2" being taken off in a miter box. I had to drill the mounting holes a little for the recoil pad (yes you'll have to re-shape the contour) attachment , but she's been running it well, pain free since January.
It's an easy fix, didn't cost me anything but some time and made a world of difference in her being able to fire extended strings of fiire without pain (shoulder or face).
When I figure out how to post some pics here I'll show the "rule of thumb" for LOP measurements.

He was using the cheapest 00 buck brand, Rio.
), consider the back-boring if you want, since that can have an effect on the pattern. For patterning concerns though, it's easier and likely more effective to choose the ammo that patterns best from your shotgun... and last I recall (unless I'm confused) the LE132 load is the "Flite-Control" wad, no? That wad system already makes the #00 buck pattern as if it were a slug, more or less, out to like 25 yards? Shooting LE132 from a VC barrel setup is almost like belt and suspenders, imho...
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