Speaking only for myself, there's no way I would put centerfire ammo (or any other kind) loaded by someone I barely know into a firearm I own. Period.
Over the decades, I have seen some bat-shit stupid crap on shooting ranges. I was 100 yards away when a guy's reload made his Remington 1100 sound like a parade round in a 105mm howitzer. Everyone ran toward the range, thinking the worst. The guy just didn't understand; "It's just one of my reloads," he said as he reached for shells to keep shooting.
He was ejected, then and there.
He may offer to sell you some 6.5CM reloads.
Conversely, over the years I've had a lot of people - always strangers I knew casually at best - ask me to load ammo for them. No Way. I have faith in my reloads/handloads, but not in other shooters I don't know. Like the guy who attracted lots of attention on a skeet field because the gorgeous old LC Smith double he had inherited. One of his reloads was a dud - primer fired but no powder - and the wad stuck just behind the choke in one barrel. "I'm going to go clear it," he said.
People assumed he meant he was going to get one of the dowel rods kept on each field for just that purpose. A few seconds later, the was a huge BOOM from the adjacent field. Apparently he couldn't find the dowel so he decided to just shoot the wad out with a normal shell.
The beautiful old firearm's barrels were destroyed; the blocked one split and peeled back reminiscent of cartoons.
Had he been shooting my reloads.....?
O hell no. Just no.