I picked up a used Brunswick Grizz Vintage Urethane on ebay.
The ball is drilled with a simple old style layout, CG right in the center of the palm.
The Grizz with this layout only gets about 1 inch of flare for me. Lol!
I refinished the ball back to stock grit of 320 wet sand.
I am bowling on a normal house shot.

This ball sucks up oil like a parched Grizzly Bear!
I could not believe how fast it absorbed the oil. At first I thought there was actually no oil on the lane since I am used to oil staying on the surface of urethane balls. So I took a test shot with my rubber ball just to see and it just skidded and would not grip.
When I got the rubber ball back it was drenched!

So The Grizz is a thirsty animal...

As I discovered this day, The Grizz is simply too strong to play up second arrow, but too weak to push out from third arrow.
If I played too deep in the oil then I left 5 pins or worse, the 5-7 split.
So after some experimentation I had to play around 12 1/2 out to about 11 and back.
I had to hit this line perfectly to strike.
If I missed a touch right I had a ton of flat 10's and if I missed a touch left it went high leaving 4-7's.

It was real, real hard to play this ball at this grit.
I believe I will take it up to 500 grit so I can move right with it into the friction to get a more consistent response.
This ball is the smoothest ball I have ever thrown.
It is perfectly predictable and when it overreacts it is a soft move left, not a jump.

The Grizz is a vintage urethane ball that is super strong and hooks really early and then sets and rolls the rest of the way.
Don't expect any backend out of this ball, it is not designed for that.
It is designed to provide a consistent and accurate roll that can keep you in the pocket all night and let you pick up all your spares.

This is old school bowling, enjoy The Grizz.

https://www.youtube.com/watch?v=A3py5SauDXE

Here is a second video I made of the Grizz.
This time I play up the boards with it at 500 grit.
Watch how smooth and controlled it is.

https://www.youtube.com/watch?v=YlXplKwltus

I am a classic Full Roller.
I have low revs and zero tilt and I also have lower ball speed.
So I have to keep my angles to the pocket straighter for the best effect.
The Grizz was so strong that I could not keep my angles straighter so I was forced into Full Roller's no man's land and strikes were hard to come by there.
I just took the grit up to 800 Scotch-Brite and I will see if this allows me to move back to the right and play up the second arrow in the oil line.

I recently obtained a Visionary Midnight Scorcher particle urethane that is amazing and despite being so strong, allows me to play straighter angles on house shots as long as I keep the grit up at 800 scotch-brite.
I reviewed the Scorcher here:
http://www.ballreviews.com/visionary/scorcher-t39.15.html
Take a look at the video and check out some of my other ball videos on my Full Roller youtube channel if you are interested in learning more about this vintage style of bowling .

"Hits like a turd..."

Lol!
Yeah, that pretty much sums it up.
I was sweating bullets trying to get this ball to strike.
I have never been in the pocket more and got less strikes.
I just took it up to 800 grit Scotch-Brite, maybe I can keep it in the friction now so it has some hitting power?
It only cost me $48 so it was an experiment.

Really starting to fall in love with the suitcase release.  I don't have a lot of hand usually anyway and it removes another inconsistency from the equation.  Makes much harder to miss your target which for me is more important than slightly better carry I get for nominally more revs (which don't matter if miss anyway for most part).  I can actually consistently throw that way at up to 16mph (usually around 15 though) comfortably on the overhead no sweat.  Really allows the ball to do its thing instead of forcing entry angle with hand as well.  I can see that style does have a ceiling but I love the floor is darn high at least for me as well with it.  Plus just feels really comfortable.

>I find for myself, symmetric cores with very high RG and Lower diff with low flare layouts compliment my straighter game and let me stuff it right in the pocket with less over under effects. It also lets me pick up all my spares with my strike ball old school style.

Pretty much describes my arsenal save for low RG on a Scandal Pearl and an asymmetric Stealth Bomber solid I hardly throw (condition specific) though my diffs on average are a bit higher with more flare so still need plastic or a blue hammer for spare duties.  More of semi roller I would say but still depend on accuracy and not energy to score.

Want to sell it I am interested

I want to work with The Grizz for awhile and try it at different grits on house shots and see if I can get benefit out of it before I write it off. If I am not able to get the ball to compliment my style then I would be willing to sell it.

One word answer...bone dry boards early and ferocious backends, rubber is so smooth and controllable and some days hits!.

Rubber up the 5 to 9 board dry.  All the way.

Regards,

Luckylefty

I love rubber. My all time high game of 259 was bowled with rubber.
Here is a video of my Hardwick rubber ball in action: https://www.youtube.com/watch?v=RcPMbu90NVk