im shooting a martin rebel 50@28. what size carbons should i shoot?
I would try a 500 spine arrow like Vapor 2000,GT 35/55,Beman ICS 500 or any other 500 spine and start full length and tune from there.By trimming or a heavier point weight.
Here are a couple more, CX Heritage 150's, Arrow Dynamic Traditional Lites.
If you are drawing 28, and shooting 29 or 30" arrows, the above are all good.
If you have a longer draw, go with a heavier spine. Shorter, go a bit lighter, etc.
For stumping, and general futzing around I had good luck with GTs. For hunting I use an AD Trad.
Good luck.
Nate