What is your intended use? I have a Boyd's Lightweight Thumbhole (Aluminum pillars & Accraglas bedded) on my .260 Rem hunting rifle. Very happy marriage. It has the Axis style magazine that I am underwhelmed about - though I used a E. Arthur Brown bottom "metal" that is a crisper lock-up than the synthetic OEM stock. I leave the magazine in place and just load from the top. It functions perfectly - I just don't put much faith in that plastic "hoop" retaining mechanism.
Only complaint is that the safety is harder to reach with the thumbhole. Has not proven to be an issue in the field but adds a little motion.
I'm able to load out to 2.900" (0.10" over SAAMI) with the short action; though I haven't needed to go past 2.875" to get a 0.010" jump with the bullets I use. Savage did well by the .260
It's a great cartridge. Pity Remington did their typical stumble and introduced it with the wrong twist.
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