Found this from BowlersJournal:
EBONITE: SR300
By Joe Cerar Jr.
May 9, 2006, 10:59 AM
THE MAGAZINE REVIEW
Core Design:
The asymmetrical core boasts an RG of 2.58 with a .038 Diff. It has a conservative Mass Bias rating of .009, or 1/3 that of the One series. The higher RG helps delay roll, thus creating a more angular move off the breakpoint. This new core has the highest RG and lowest Diff in Ebonite's entire lineup of two-piece core designs.
Coverstock:
The One's original coverstock base with a light pearl additive.
The quad-coloring is an appealing mix of blue-green-purple-black with a hint of white fazing for good measure. It's finished with 4000 abralon with no polish. Manufacturer's Intent: This is the first ball in Ebonite's Gold performance category (The One series is in its Platinum performance group). Ebonite now has three totally different ball motions with this newer coverstock base, which helps dissipate the oil quickly off the ball surface. The SR300 will fit between the Ones and the Big Times with total hook. "When looking at replacing the extremely successful V2 Series, it was a daunting task," said Ed Gallagher of Ebonite's R&D team. "Ron Hickland and I thought long and hard about what to do, and I think we've come up with an exceptional product in the SR300. Do not think that you'll receive ball motion similar to the V2...With our new veneer technologies and new core design we're using in the SR300, the ball motion will be cleaner than the One series products with strong back-end ball motion."
Test Results: We naturally decided to compare this product with both Ones and the new Smash Time, all with a dull 4000-abralon finish. The SR was the easiest of the four to the breakpoint, and had the most angular move as well. All four balls read lane transition well with no sudden moves or surprises. Total hook was one board less than the polished One, about 3-4 boards less than the Big One on synthetics, and 2-3 less on our wood test pattern. The SR's hitting and carry power was superb. When tested with high polish, the SR300 was about 6-9" later and 1-2 boards less hook than the original The One. The SR tied with the Horizon as the loudest of the test balls for those interested in drawing attention to their strikes.
When to Use:
We all found success on any medium to heavier oil, or on longer patterns on either lane surface. You could stay deeper in the pattern and not lose carry as long as your ball speed matched up properly. Hitting the friction area too early can affect energy retention adversely unless your ball speed is noticeably stronger than your rev rate. We found above-average carry from any angle on the lane, but had to decrease our side turn to maintain the pocket when playing extreme outside angles.
