How to Choose a Rod

[cutuzov]

Yes 50 pound test line broken more then once is strange. You might consider checking you rod guides for sharp edges or cracked inserts.
From your explanation i am assuming you use a bottom rig without leader with the fairly heavy sinker above the hook . Is there any bumpers between the hook and sinker like beads or swivels ?
I did lot of carping this year. The rod/reel combos( 50-60$ Canadian tire staff) I am using for carp all outfitted with 20-30 pound test braid, Leaders are 20 pound braid. I am using Hair Rig setup. The drag is always set the tightest on the reels. This bastards are tending to run into snags. The biggest carp i landed this year was well over 35 pounds. Got my worn off leader broken once in maybe 30-35 outings.