by Chronos » 02 Jun 2015, 4:06 pm
Not my thoughts but it's the first reference to the design i could find
"The Myra Extruder was originally developed as a .22 rimfire with a .20 caliber barrel. The .20 caliber shot acceptably, but the velocity increase was only slightly better than the standard .22lr, so it was considered not worth the trouble.
When the same approach was tried with a .17 caliber barrel, the bullets were squeezed to about 1" long and the resulting stabilization problems couldn't be solved, even with going to a 1 in 6" twist barrel. So the "extruder" concept was basically considered to be more trouble than it was worth."
I'll be interestred to hear how it shoots, i had a play at 200m with my .22 on the weekend and the biggest issue was finding a suitable aiming point meters above the target to aim at. I ended up maxing out my scope elevation and using the very bottom of the reticule and adjusting magnification until point of impact matched the point of aim. there was little wind to deal with so once i was on paper i managed to get quite a few hits on a 2" shoot and see target then a few hits on a 1" sticker on a target though there were quite a few 3-4" away.
I chose to use standard velocity ammo because i was aware some other ammo i have used becomes quite unstable when it goes transonic at around 100m and i wasn't convinced this wouldn't cause issues further out
The winner put 10 shots into a group around 3" wide and 2" high (from memory) , quite an impressive feat IMHO
Chronos