i dont agree on this as 10lb increase for a MAIN movement would be ok, your front squat probably being a weaker movement and being done much more sets and reps, might not feel appropriate…
there was a time when i did BBB 5x5 or 5x3 and i couldnt do all the sets and reps with prescribed % of my main lift(BBB being done with same basic lift).
I am doing Rule Of 50 now, which is basically same BBB 5x10, but the goal is to do 50 reps in no matter what way, so first sets are higher reps, etc.
I also use alternate lifts as my CNS is weak as shit and if i do anything over 1 set of heavy deadlifts, i crash and burn, and get sick.
So my deadlift supplemental is good morning, for squats its box squats, and for presses its dumbbell variations.
Dont overthink it - just pick a weight and do your sets and reps. If it felt too light - next time take a bit heavier weights. If its too heavy - pick a bit lighter ones.
Nothing changes if you skip a few reps on your FSL cuz u picked a bit too much weight, and nothing happens if you will have 1 session too light also. Just go by that, and progress by small incriments.
What i do is this : So lets say im doing Rule Of 50 on dumbbell overhead press. My goal is 50 reps, so im doing like 15-15-12-(8-10). If i cant complete these reps, i just keep doing this weight no matter how many weeks until i can, and when i can, i jump the smallest possible incriment on a dumbbell… If its goodmornings or box squats i might jump 5lb plate and keep grinding until i can do all the sets and reps.
Unless you are newb or very undertrained, i dont think its possible to increase supplemental lifts every cycle by such large amount of weight as it is expected to do in a main lift. In fact, most people cant add that much on a main lift also. Once you deadlift 5 plates for reps, then yes - maybe 10lb increase is ok… But you take a woman who deadlifts 2 plates, and adding 10lbs to her deadlift will take good 2-3 reps off of her AMRAP sets and it will get waaay too heavy in 2 cycles.
That is just my experience and opinion but - you shouldnt treat supplemental work as strenght work, therefore i dont think you will be able to increase ALL the lifts by 5-10lbs so easy all the time.
For me, it sometimes takes 2-3 full cycles to, lets say, add 10lb jump on a lat pulldown(im too weak to do real pullups) and maintain required sets and reps.
What @dagill2 said makes sense, but lets look at it this way, from my experience - i do squats with 4 plates for reps, but i do my supplemental work box squats with only 1,5 plates… so lets say my training max on Squats is like 440 but on box squats its like 350 or almost 100lbs less… adding 10lbs to both means a LOT bigger jump percentage wise for box squat and also i have to do three to five times more work on that one, than on regular main lift squat… i would hit a wall very very fast… so i would recomend - keep your supplemental and assistance work hypertrophy oriented and go by feel and increase when possible, not grind yourself into the ground chasing TM increases.
I actually believe that 531 should call for TM increases by a % not a set weight. When i train beginners it is almost never possible to increase lifts by 10lbs every cycle if the person barelly deadlifts 1 plate a side. My common practice for beginners and girls is dropping increase in half(i actually made 1,25lb plates for them)… Also 10lbs increase on lower body is a fuckton for a single plate deadlifters while it might not even be noticable for someone who reps with 6 or 7 plates… I believe that a TM increase should be based on a % based off your lifts, so stronger people increase more and weaker ones - less.