Hoyt Formula HPX Limbs For Hunting

[45-90scout]

Have the above and shooting 30" arrows, medium limbs giving me a 68" bow. Would like to try my hand at instinctive upland game this year. Looking at long and recurve hunting bows, I'd say the majority are under 66". For a 66" with my 25" riser I need short limbs. Is this advisable or should I stick with medium. I have an opportunity to purchase long limbs - but that a 70" bow through the bush.