I believe I am missing one type of reaction in my arsenal. A ball that has a relatively mild coverstock, yet plows through the pins with very little deflection. Is there any consensus on which ball might be considered a very hard hitting ball, despite a relatively mild or non-aggressive coverstock?

In other words... something stronger than plastic, but not a lot. With an aggressive core and mild coverstock? Is there such an animal?

I want it to get down the lane and have minimal movement, but plow through pins ---presuming it's on target.

Roto grip MTX "Blem", there is not another ball like it.

"These are almost unique. During the manufacturing process, the resin additives were basicly left out of some batches of these, leaving the coverstock basicly like urethane. Mtaching this with the high differential core which, if put into a new ball would not be leagl for use, gives you a very high flaring ball that can be used on lighter and shorter oil patterns meaning that you do not have to sacrifice reaction and caryy though you would if you used a basic entry level ball.

http://www.rpsbowling.rpsenterprise.com/balls/blems/

I have one, and I also used to have the regular(non-blem) MTX, and this ball is as advertised.

Brad