At least the two of us know just how few of these 264 Win Mags were made in this run. Congrats on finding one; that is the best wood I have seen on rifles from this production time frame!
The only bullet I have tried with a Magpro work up was the 120 E-tip. Best result was 3400+ fps and 1.2" at 100. Again that was the only trip out there thus far.
WOW, gorgeous wood!! I'm not knowledgeable on Ruger collectibles, is the .264 No.1 rare? Looks like the one that was posted on here a couple years ago. .264 No. 1