You maybe able to get a brass or steel insert for your aluminum arrow. Also, I have broadheads up to 220 grain screw in Muzzy Phantons). Or maybe a steel adapter with a glue on type broadhead might get you in the range you are looking for. I believe a grizzly broadhead can be bought up tp 190 grain, that along with an adapter and a steel or brass insert could get a lot of weight up front. The problem is that you would still have to experiment and it would still cost $$$'s.