I'm one of those holdovers who still hasn't been able to make the change to throwing a semi-roller, and my ball speed is only about 11-12 mph. But that doesn't mean I don't want to take advantage of the right coverstock and weight block technology... Can someone help me pick a good ball for heavier "house" oil conditions? 

A freind of mine who has a bit more ball speed than you but still rolls full roller has found sucess with the Reign of Fire.  Would depend on the type of conditions you encounter.  He bowls on a house the is decently med-heavy oil.

I know a lot of bowlers will say this ball is too strong, but the long and strong full roller drilling on the Brunswick Alpa Max is a tremendous ball for a full roller bowler.  I bowl with some senior bowlers who throw the Alpha Max and they look great throwing the ball.  The ball can be polished if needed, but they are throwing the ball out of the box condition and doing very well.  These seniors are in the mid 70's to early 80's.

 

 

Again I thank you for your recommendations - one ball I am using now is a Black Widow Sting but I think because of miscommunication with the ball driller it was not drilled for full roller. He may have assumed that like 99.9% of the rest of the world I throw semi-roller and didn't look at my other equipment; I forgot that he was not my usual ball driller and didn't know me - so it's equal blame. My other ball is Columbia Formula (properly drilled) but it is getting old.