I regularly spend over an hour at a reasonably comfortable pace in the gym, I'll take a look thanks!
Also with coming to your strength max, drop a few reps off the set but add 2.5kg. If you can manage it, next session put in a couple more reps for a fuller set then next week add 2.5kg more and repeat would be my advice. That's what I tend to try to push through!
Last bit of advice I'd offer (i find it works for me) I'd avoid calf isolation exercises and squat machines such as the smiths machine. Anything on big lifts that is guided doesn't allow core and natural movements (ones you probably won't recognise) are more likely to cause injury as you don't allow all the muscles to utilise and move naturally.
Secondly, (coming from someone who had chicken calves and they're alright now) the best thing for calf building is constant added weight. Intense, heavy weight isolation once a week or so isn't enough. Calves are slow twitch designed for endurance due to our need to walk long distances. Add a little weight or a weighted backpack to your walks and heavy lifts in general regularly will target your calves naturally (squats, deadlifts, rows etc). Not sure if that's a problem at all just how you mentioned blowing your calf out!