Swan Rim Fire Barrels

[allan]

Has anyone here seen a Swan 22LR 3 GR 15"T barrel in action?
I don't "do" social media but understand a few of these have been fitted to CZ457's & Rim X.
I have Benchmark, Kreiger & Mullerworks 16T barrels for my Rim X but am thinking about a slightly faster twist just for something different!
BM 3 GR barrels have worked very well for me on a number of actions.

[bladeracer]

Has anyone here seen a Swan 22LR 3 GR 15"T barrel in action?
I don't "do" social media but understand a few of these have been fitted to CZ457's & Rim X.
I have Benchmark, Kreiger & Mullerworks 16T barrels for my Rim X but am thinking about a slightly faster twist just for something different!
BM 3 GR barrels have worked very well for me on a number of actions.

If you're going to tighten up the twist rate maybe go a lot tighter so you can use the copper ELR bullets made by Cutting Edge?

https://cuttingedgebullets.com/collections/curx-22lr

[allan]

While I love tinkering with 22's, going down that road would be beyond my current abilities!
16T has always been my "go to" for rim fire but have read a bit of chatter about 13 & 15 twists performing OK at longer ranges with decent factory ammo.

[Duramax]

9 twist is trending more than 15 or 14 twist. Now what is coming out is that spin drift doubles at those twist rates where Litz has measured a change from just over 6 inches to more than 13 at 400 yards. The other issue Litz talks about is sensitivity to ammunition imbalance where it may shoot well in 16 twist but not so as the rate increases. The flip side is the vertical dispersion decreases at longer ranges with the faster rates. So it's a catch 22, shoots like crap at 50 but shoots closer to linear vertical dispersion beyond 200 yards. So a half inch vertical at 50 doesn't result in 4 inches plus at 200, but closer to 2 inches of vertical. Well according to Litz anyway.
What I do know about is that benchrest trends in more recent years moved to slower rates right down to 17 but seem to have come to a competition tested 16.5 for regular 40 grain standard velocity match ammo.
Now Fly shooting with a rimfire is interesting where a couple of Anschutz rifles in recent years have set record groups and scores. One of them belonging to a good mate from Mackay was loaned to John Lavaring who set a small group record down there in Canberra at their annual Fly matches. Since beaten but the interesting bit is that it was known that there was an "accidental" reset of a sine bar on one machine to 1 in 17. This is one of those rifles or rather barrels. Now across the river in that time of communist East Germany, Suhl made equivalent match rifles that in later years found their way to the US, were dirt cheap, but suddenly dominated ARA and BR50 matches for years. Today they fetch premium dollars but back then after many years of competition it was discovered that they had 17, 18 or even 19 twist barrels. No accident, but by design. Seriously butt ugly rifles but shot incredibly well.
By my reckoning, inside 200 yards and regular match ammo 16 to 17 twist. Beyond that and 60 grain ammo, 1 in 9 twist.