Tuning .22 Vulcan 3 500mm barrel / low power plenum cfg - pleasantly surprised

Subject says it. I got it a few weeks ago and now have a couple hundred rounds through it and many starlings and pigeons to boot - some were pretty cool shots too -- out to 80 & 90 yards with h&n 18.1g pellets. ;-) ( most between 40-60 though )

Having gotten used to shooting slugs though . . . and a couple of pigeons seemingly 'catching' my pellets like a baseball catcher behind the plate - and then "flipping me off" ( lol ) leaving me scratching my head . . . . ( some pigeons can, sometimes, be surprisingly tough . . . ) I decided to grab a box of NSA 20.2 ( .216 ) slugs and give 'em a go. They showed up today and - get this - I made ZERO change to the gun - singular, only difference is the ammo. I expected them to run a little slower than the pellets - A) slugs, B) heavier. I shot 4 or 5 over my chrony and indeed - mid 830's. ( vs the pellets @895 ) OK - that wasn't entirely unexpected.

Here is what was unexpected. I had two targets still up in the back yard after having mowed it yesterday - one @30 and another at the far end @70. I took aim at the near one first ( 30 ) and pew! "Whoa . . .. " Dead nuts. "What?" ( I expected it to hit a little low ) Nope - sent 4 more - nice tight little group. "Well hell - I'm gonna dial up that one out there at 70 . . . " Pew! ( kinda chuckling a little bit as I could "see" the slug flying towards the target but . . . ) again - damn near dead nuts! "Are you sh#@in' me??" :) :) I send another 4 or 5 more - not ~really~ trying to hold dead on, trying to shoot the pecker off of a gnat mind you - but you know - it's a 1" bullseye and anywhere on that, or even the outer ring of it is a dead pigeon. This thing, with the slugs - not going super duper fast mind you - was delivering dead pigeon all day. :) :) :)

~Everything~ I've read via searching these forums here indicates that these slugs really like mid to high 900's . . . . I've had this gun apart a couple of times and have already familiarized myself with the reg -- I figure a 1/4 turn will get me into that mid 900's range but . . . . . I may just leave it be for a little bit. I need to get to one of my farm permissions and try it out against some pigeons. I duplicated the gun setup in my strelok just for the heck of it and ( obviously ) changed the ammo and then compared the ft/lbs at 70 yards between the 18g pellets and these 20.2g slugs. There is already a 4 or 5 ft/lbs advantage for the slugs over that distance. Nice.
 
Gotta love it when you luck out with a pellet and slug tune in the same gun with limited (or none) changes. PLEASE do yourself a favor and document every setting that it adjustable, take pictures as it is right now. Write it down, put it in the gun case. Trust me, you will thank me later. If your anything like me, you can’t leave well enough alone and will fudge it up and want to return to this oasis of a tune. 




 
Well...kinda like the folks in the US and the folks across the pond in the EU...where they don't have the horse power that the US does.

It's odd...right...that even with their lower power, they can hit a bulls eye with nary an adjustment either !

The shooters in the US seem to NEED more power to do what the Brits. do with...lower power !

After reading some of the EU web sights, it seems that the US shooters have to brag about the size (gun power !) between their legs more than the Brits do..!

All (most all) of my guns are turned down. I can still hit the bulls eye, with different weight pellets, and beat up the gun...much less.

And yeah, my short Vulcan 3, just shoots, and shoots, the bottle pressure needle just doesn't move much.

Mike
 
Well...kinda like the folks in the US and the folks across the pond in the EU...where they don't have the horse power that the US does.

It's odd...right...that even with their lower power, they can hit a bulls eye with nary an adjustment either ! The shooters in the US seem to NEED more power to do what the Brits. do with...lower power ! After reading some of the EU web sights, it seems that the US shooters have to brag about the size (gun power !) between their legs more than the Brits do..!

All (most all) of my guns are turned down. I can still hit the bulls eye, with different weight pellets, and beat up the gun...much less.

And yeah, my short Vulcan 3, just shoots, and shoots, the bottle pressure needle just doesn't move much.

Mike