Hi @Max_fr,Hey guys,
It seems to be a silly question...
The heaviest kb i have is a pair of 20 and i can use one single 24 from a friend. I could double press the 20s about 14 times few weeks ago.
I was wondering if i could press / push press / jerk maybe a pair of 28. But i don't have any to know if i am strong enough.
Is there any kind of rule like: "if you can press this weight X times then you could press X+4kg ..." ?
I'm not sure i want to get a kb of every weight available on the planet and especially a pair of each ! So i was thinking maybe getting a pair of 28 and stop buying ! I would have 16, 20 and 28. But am affraid the 28kg may be too heavy... don't know !
How do you know ?
I agree with the folks here who are saying that jumping from the 20kg to the 28kg is a big jump. Echoing @Don Fairbanks that a 24kg or a pair of 24kgs will be more versatile for you.
With regards to the military press, this video shows you some drills you can practice to increase your pressing strength if you're working with a heavier bell that you cannot press yet. i.e. Heavy cleans and rack holds, and heavy negatives. It also includes a drill you can practice with a lighter bell, your 5-8RM bell: paused and partial presses.
Hope that helps! Keep up the strong practice!