It's funny because I had no idea that Remington rimfire ammo was crap until I heard it on the internet. I've been using the stuff for at least 25yrs, heavily in the last five. I've said it before and I'll say it again, try everything. I've always had excellent results with GB's and go through a good 2000-3000rds of the stuff a month. Which is saying something because I can save $2/550rds if I buy Federal by the case. Problem is I have a couple guns that won't function with Federal and they're loaded with a very poor game bullet.
I watched a video last year where a shooter leaded the bore of his Ruger 22/45 with Thunderbolts so badly that the rifling was completely covered in it. I hadn't used it in several years so I went to the shop and bought some. Then I burned through 300rds as quickly as I could in my Ciener 1911 conversion (doesn't run with Federal bulk) without a single malfunction or leading the bore.
Here's what my CZ452FS does with GB's. Five consecutive five-shot groups, no sorting, no trickery, averaging 0.49"@50yds. Smallest is 0.30", largest 0.65". Wolf MT only cuts the average to 0.39" but is obviously much more consistent. I've got two dozen rimfires and I don't believe there is a single one that does not function and give at least acceptable accuracy with the stuff.