As most know bowlers lefties and righties all around the country in general experience different conditions even when bowling on lanes that have been oiled supposedly the same to start.

In general at least in most shots I have seen one could usually say that lefties see more oil on their side, or probably said more correctly the lanes play on the left as though they have more oil and stay on the left as though the have more oil.

Also bowlers on the left play wider angles and shallower angles so therefore very often they have drillings that do not achieve as much entry angle.  If they did they would tend to leave more backrow pins.

So therefore as I have occassionally travelled I have noted that IN general.
Two equal handed bowlers using the same balls one right and one left have different drillings.

ie the right hander will tend to use a longer pin to pap(more length and easier to get thru drier heads).  He will also often have drillings designed to flip more to get entry angle from his deeper inside position.
The left hander will often on the other hand drill a stronger or shorter pin to pap, often kick the cg out (for more midlane) and then somehow try to deaden or weaken the backend flip with a weighthole which cuts down on backend.

Generalities.

As a result since I've seen this over and over all over the country this wetter lefty shot where midlane is needed I've often used stronger pin positions.

ie 3 3/4 to 4 1/2.

Now I'm in an area where there appears to be NO or very low volume midlane oil.

All of a sudden I'm throwing balls with 5 3/4 inch pin to pap, 6 1/2 pin to pap and I'm getting to the breakpoint easily.

A bunch of my stuff is like that because it was picked up from and drilled for righties and I'm just testing.  Of course it also has the cg on the negative side.

I'm actually considering drilling one of my most hated drilling from when I would see midlane oil.  5 1/2 X 5 1/2.

Also does anyone have any opinion on why it matters if sideweight is negative in relation to the grip.  You sideweight gurus shouldn't we only measure sideweight in relation to the track???  and the first track ring?  Doesn't this make more sense in relation to ball dynamics where the weight of the core is in relation to the track?

REgards,

Luckylefty

About 13 to 15 revs down the length of the lane.  about 50 degrees axis rotation.

REgards,

Luckylefty
Good rotation but not great!

This is not THE Winner.

I have a whole other set for other areas of the country.

But for local.
Icon 2 1500 grit with Black Magic to hand burn drilled 4 3/4 X 5 1/2.
El Nino Wrath 1500 polished with Black Magic to hand burn 4 3/4 X 5 1/2.
Hot Wire 4 1/4 X 3 1/2 (stacked sanded to 600 and polished for a day!
Sonic boom 4 1/4 X 3 1/2 1500 and black magic
Occassional I'll go to "normal" lefty shot houses(tear em up) shots a Crunch left in box and drilled 4 X 5.  ONly when I don't want to learn any more.
Use all day(midlane and backend).

REgards,

Luckylefty
PS all old stuff has cg kick out, ie 4 1/2 X 3 etc.

I played with a few balls that cg kicked track side with long PIN to PAP (basically righty drills) but the flare rings tended to belly back around the thumb hole and an occasional thud was common. It reacted very long and smooth arcing but for all the work making a closer assessment of correct cover  and core strength needed seemed like less work. Whats the sense of drilling the guts out of a ball when there are so many that are weaker in nature? I threw both a Reaction Arc and a Blue Rhino- Special edition with drills of 7 and 7.5pin and cg of 6 3/4 and 6. The roll kind of reminds me of urethane.