Vince,
Regarding the use of the heavier 62-69 grain bullet in a slower 1-12 twist, the slower twist would not stabilize those longer, heavier bullets as well as the 1-9 twist. For long range shooting, Colt's 1-7 twist with heavy bullets seem to be the best combination so far (see Glen Zediker- sic?).
Figure out what you want to do with your .223 before you decide. Tack driving accuracy and killing are two different tasks.
For killing, the slower twist allows for greater instability, which makes for nastier wounds. That's why the old military 1-12 or 1-14 was effective. When the military adopted the heavier bullet and the faster twist, range and accuracy improved, but not without a cost. Heavier bullets with little yaw can actually pass through the target. Light bullets which are unstable can stay in, following the path of least resistence.
For an example of the difference in effectiveness, read Mark Bowden's, "Black Hawk Down" about the attempt to snatch Somalian Warload Aidid. Close range hits did not guarentee the BG stayed down.
For further reading on twists and their effects, check the following links:
http://www.firearmstactical.com/briefs13.htm
http://www.ar15.com/products/barrels/twist.asp
For myself, I'm not into combat and using cheapie (read surplus 55 grain) ammo), am quite happy with the Varminter. Oh, mine is the VS (synthetic HS Precision stock and not the VLS, laminated stock). Regarding the PSS, check with your dealer for Law Enforcement Products. My D&R Sports catalog doesn't list them either.
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