Need help with 6.35 slugs questions in my two airguns?

Hello airgun nation people i have heard so many great things about slugs that i am goin to order lot of slugs but first need some advice for my two 6.35 cal pcp airguns edgun matador r3m long with orginal barrel and Hatsan BT65 SB with orginal hatsan 6.35 barrel! Hatsan too have High Power XXL Tuning Regulator By Huma-Air. Both of my pcp guns have enough power to shoot slugs at high speeds!!

I have edgun r3m long matador 6.35 cal with orginal 24 inch barrel with huma regulator. What size and weight 6.35 zan, hn, altaros, jsb and other brands slugs you recommend to try? If you know for sure that some sizes and weights 6.35 slugs wont work on edgun or hatsan orginal barrel that helps greatly that i dont need to try every single 6.35 slugs!!! Also i am goin to order new barrel for my edgun and maybe for hatsan too! What barrel would you recommend which shoots 6.35 slugs with good accuracy?

What size and weight 6.35 zan slugs you recommend to try with Hatsan BT65 SB with orginal 6.35 barrel to test? If there is 6.35 slugs that you know surely wont work with hatsan 6.35 barrel i highly appreciating if i dont have to every single slugs to find what gives best accuracy!!


with many thanks in advance!