One thing to take into account is the weight of the rifle. My little .308 Remington Model Seven kicks like a mule, because it only weighs about six pounds. Then again, it gets so hot that volume has to stay way down, or accuracy goes away.
Also, keep in mind that if you hand load, you can make mild range loads. My brother worked up light loads for his 7mm Rem Mag that don't kick much at all, and yet they still print 1/2" or so groups at a hundred, on a good day. In fact, with the light loads, the 7mm Mag is more comfortable to shoot than my .308!
All that said, my current tolerances are such:
.308-about 50 or so, depending on the day.
7mm w/ light loads-I haven't found a limit.
.338 Win Mag w/ full power loads-10 of those, in two groups is plenty.
8mm Mauser-about twenty, or until I decide the rifle isn't worth wasting bench time with.
Just my $.02.