re: I can definitely be a little aggressive with the grapple it’s in my nature and knowing myself I think I may need a heavier tractor
No, a heavier tractor won't help.,changing your 'nature' will ! All a heavier tractor does is allow you to lift even heavier loads 'aggressively' and can cause MORE problems. Really, you need to learn to use NOT abuse the tractor. Operating tractors should never be considered a 'race'.
With almost every loader attachment(bucket,grapple, forks,etc.) a certain amount of rear 'ballast' is needed. How much depends on tractor, attachment,payload,terrain,tires,operator,etc. Generally speaking start with 1/2 of whatever the loader lifts as rear ballast, then 'dial in' what is needed for safe operations. Too little means unsafe, too much, wastes fuel and extra stress on tractor
Ballast can consist of
1) filled tires, usually salt water, beet juice or WW fluid. All have 'pros and cons'
2) wheel weights, usually cast iron, steel or concrete.
3) 3PH implement, usually rear blade, box blade, carryall with skid of balast
I prefer #3, carrayall/skid combo. #1 and 2 are 'permanent' weights that probably aren't needed 24/7. They add stress to tractor, waste fuel, damage terrain.
Using the carryall/skid allows you to have 2 or more skids of ballast. Grab the light one for say mulch moving operations, the heavy one for when bucket loads of stone get moved. Being able to 'dial in' the ballast allows for the best performance based on what you ARE doing.