Bill Calfee
Gun Fool
Is there magic in 27 inches?
CYA friends:
A lot has happened in the advancement of rimfire accuracy during the past few days.
I'm still flummoxed about that .2225" groove diameter kicking out those groups.....especially that 110 yard stiff....mind blowing.
There's a sub plot to this story.....
That Muller, Accu-Twist 4-MI is 27 1/4 inches long.....by .900".
________________________________
With 2,000, plus, attempts in the short history of the PSL, there's only been one score of 12,000.....( 12,050)
And that was kicked out by a 27 1/4" by .900" barrel.......another Muller 4-MI, although not the Accu-Twist version, of course.
____________________________
So, is there magic in 27 inches?
__________________________
Oh, I need to add something to the 6.88mm story kicked out by that .2225" groove diameter Muller:
The gun was tested, not by removing the action and clamping it, but by clamping the stock in the vise.
The owner did not want just the barreled action only tested....( I don't blame him, I would not allow that to be done either)
So the Lapua test facility clamped the stock in the vise.
This worked beautifully, as the stock is one of the Killough, full-fill straight lines, which are marble hard.
_____________________
For the longest time I've firmly believed, that there is an advantage to long barrels in rimfire accuracy work.
So much to ponder.
Your friend, BC
__________________________
CYA friends:
A lot has happened in the advancement of rimfire accuracy during the past few days.
I'm still flummoxed about that .2225" groove diameter kicking out those groups.....especially that 110 yard stiff....mind blowing.
There's a sub plot to this story.....
That Muller, Accu-Twist 4-MI is 27 1/4 inches long.....by .900".
________________________________
With 2,000, plus, attempts in the short history of the PSL, there's only been one score of 12,000.....( 12,050)
And that was kicked out by a 27 1/4" by .900" barrel.......another Muller 4-MI, although not the Accu-Twist version, of course.
____________________________
So, is there magic in 27 inches?
__________________________
Oh, I need to add something to the 6.88mm story kicked out by that .2225" groove diameter Muller:
The gun was tested, not by removing the action and clamping it, but by clamping the stock in the vise.
The owner did not want just the barreled action only tested....( I don't blame him, I would not allow that to be done either)
So the Lapua test facility clamped the stock in the vise.
This worked beautifully, as the stock is one of the Killough, full-fill straight lines, which are marble hard.
_____________________
For the longest time I've firmly believed, that there is an advantage to long barrels in rimfire accuracy work.
So much to ponder.
Your friend, BC
__________________________
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