First off, since the Reign of Fire has a weaker coverstock than the Virtual Gravity, Mutant Cell, or Invasion, it will not handle as much oil as any of those balls when you have the same kind of layout and same surface grit.  (However, it comes out of the box at 1000 abralon compared to the 2000 or 4000 the other balls have, which helps it pick up more in heavier oil, but gives it less bite downlane and makes it more prone to burning up in early friction)

But beyond that, do you really need all of those heavy oil balls?  And why would you need something at 500 abralon?  I can't remember the last time I bowled in any tournament or league anywhere that I needed anything rougher than 1000, and even then, it's incredibly rare that I need to use anything with rougher than 2000 on it. And that's despite me being a lower-rev stroker (just look at the video in my profile to see what I mean).  Using that much surface means the ball will pick up too soon the lane and puke in the back for me, creating an over/under reaction and poor carry.

Do you by chance have a lot of tilt or something? I've seen some seriously oily conditions before (are you familiar with the Bradley Open tournament in Lexington, KY by chance?), but never had that much trouble just getting the ball to grab the lane.

Some people say the RoF is "stronger" because they can cover more boards with it on most conditions. The Invasion is stronger as far as being able to create traction and roll and power at the pins when bowling on truly soupy conditions. The RoF tends to conserve energy better thanks to the higher RG core and slightly weaker coverstock, so it will create more angle downlane when it finds friction. If there isn't much friction for it to grab, however, it'll create less motion than the Invasion. Thats the problem with terms like "strongest." It's really vague and subject to each person's interpretation of what it means.

Just curious, is that 19mph at the arrows, or 19mph at the back part of the lane? (Qubica system measures at the back part of the lane, CATS the front part for example) If that's measured in the back, no wonder you have trouble getting traction.

I've never personally thrown an Invasion BTW, but for what it's worth as far as making some comparisons between different balls, my Mutant Cell is actually very, very strong downlane, but also gets a TON of natural length for me, even though I drilled it fairly strong trying to get an earlier, smoother motion.  I basically never use it on fresh oil, and instead just use it when I need to throw the ball away from the headpin and need to create a lot of backend angle.

Invasion is by far the strongest I've ever owned. I think the Pure Physics will give it a run for its money though to be honest. I am just waiting to throw it. I've seen it a couple times though and it flat out hooks.

IMO The Bounty Hunter is the strongest ball ive ever seen.
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Only throw the good stuff, Roto/Global.
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