i have a short action in 7-08 with a standard sporter weight barrel, that used to be a 260 mr.
mags can be fussy with feeding if the mag doesn't sit high enough.
my fault tho, as i changed the stock to a home altered sps stock.
it shoots great, and reloads faster than a bdl/adl type rifle, as all you do is pull the empty mag out and put a spare back in.
lost mags, not by falling out of the rifle.
a boneheaded moment maybe, if you drop it, or lose it out of your pocket.
750.00 ? rare ?
guess the value is what someone is willing to pay.
check gunbroker for comparables.