That falls into the “Fools Errand” category. NEVER shoot reloads someone else made, and never sell, give or barter reloads YOU made to anyone else. That’s one of the best ways to ruin a friendship. It “sounds” like a good idea, but as others have said, every miss, every bad group is YOUR fault. Whether they say it to your face or not, they’re thinking it.
You know what it’s like to work up a good, accurate load for one of your rifles; reloading for someone elses eliminates any opportunity for tweaking a load that shows promise; they get what they get, and even though it might shoot sub MOA from your gun, it can be all over the place in a different rifle. I just had that reinforced in the last week; I’ve shot a Rossi 92 .357 for a dozen years, and had a load worked up with 180gr. Bullets that was dead nuts accurate in the gun, and had lots of punch. I just bought a new Marlin 1894 Dark series in .357, and that round was all over the place. I fooled with it and several other loads, wasn’t happy with any of them, until someone suggested dropping the load a bit. 2/10ths a grain of powder (H-110) lighter, and the tack driver in the Rossi is now a tack driver in the Marlin. Since I was doing it for me, I could take the time to work it out. Loading for someone else you lose that