it is a one in 12" rate of twist good for up to 55 gr. bullets may stabalize some 60 gr but heavier bullets may suffer in accuracy..... Turns out that ALL H&R/NEF .223 barrels made will be 1-9 twist starting in 2006. This is great news to those of us who want an inexpencive .223 rifle that can shoot heavy bullets.
The H&R Handi-Rifle varmint barrels in .223 made before the year 2000 typically have a rate of twist of 1:12. This slower twist rate is generally suitable for stabilizing lighter bullets, typically in the 40 to 55 grain range. Later models and variations may have different twist rates, so it's always good to check specific models for confirmation.
Them twist rate of a Winchester model 70 rifle in .223 Rem.is 1"in 9".
$200-$250, depending on condition.
No published sn data. You will have to call the factory.
More accurate than 90 percent of the people who will shoot it.
This rifle was designed to handle 55gr.bullets of lighter.I do not believe that the heavier 62gr will stabilize with the rate of twist of the mini-14.
ar-15
1- 12 twist
The one issue with 5.56 in a handi rifle is the harder primers. You will almost absolutely have to install a heavier hammer spring. I have some Malaysian 5.56 and it often won't fire in the handi. I have heard the same about the Rossi single shots. As far as your concerns about pressures, the Handi handles all sorts of calibers on the same frame and barrel blank. Many of those push 65k or so. I don't worry about any difference in 223/556.
1 in 12
1 in 10". http://www.go2gbo.com/forums/index.php/topic,26264.0.html
The Sako L461 Vixen in .223 caliber typically has a rate of twist of 1:12 inches. This means that the rifling makes one complete turn every 12 inches of barrel length. This twist rate is suitable for stabilizing lighter bullets commonly used in .223 cartridges.