Do they even run MI ball anymore?
Not generally. the M1 ball load was a heavier bullet better suited to long-range machinegun work, particularly with the tripod-mounted water-cooled M1917 Browning gun and tank machineguns. Some Springfield shooters liked it, but recoil was severe. Now, more than you want to know:
The better choice was M2 ball, with a bullet weight around 150 grains at about 2700 FPS, available preloaded in Garand clips and six-clip bandoleers, 20-rouned boxes [BARs and Springfields] and MG belts. This was the primary Garand load for most of the war, but by the end armor piercing was being loaded in Garand clips and was found to be very accurate.
Nowadays there's still a good bit of Greek military HXP headstamped .30 M2 around; the Greeks still maintain reserve stocks of Garands for civil emergency issue. The Serbs load M2 ball in both Prvi Partizan commercial loadings, [headstamp ppu] and Yugoslav military [nny] packaging. Korean [PMC} Garand ammo is good, as is Taiwan's [Wolf *gold* brass cases] and the Phillipine's Armscor still loads decent.30 M2, and Hornady has a Garand-specific match load with the supurb A-max 168-grain match bullet. The Russians offer an inexpensive steel-cased, brass-washed 145 grain .30-06 loading in both soft point hunting ammo and FMJ ball.