I am considering the purchase of a Contender barrel in .35 Rem. I know the round has a mixed reputation in the Contender, because of headspacing problems and the fact it is not a rimmed cartridge. I have seen somewhere we 'smith cut a rim recess, and the loader forms a .35 Rem rimmed. What cartridge is used to make this round? Is the conversion worth the trouble and expense? Any experience with this round that could be shared would be appreciated.. Thanks.