Rack-attack

According to Bowtech the Solo cam is 33.3% more efficient at throwing heavy arrows than the dual cam' s.

On the last page of the manual:

speed loss: SC - subtract 1 fps for every 3 grns added
DC - subtract 1 fps for every 2 grns added

Though the DC has blistering IBO speeds (about 20 fps faster than the SC Patriot)

If you bump your arrow weight to 450 grns - they shoot about the same speed[]

Go real heavy and the slower IBO SC Pat would be faster.

Am I reading this correct??

Is this typical with dual cam single cam comparison??


Just food for thought if you plan on loading up a DC Pat

PABowhntr

From my experience with both styles of cams this is not what I would call typical. Just the opposite actually....but I also read it in the back of the owner' s manual.

walks with a gimp

My Pat DC at 70/29 does 255 fps with a 581 grain 2317, 269 with a 523.4 grain 2315. I had a 94 pound Proline Point Blank with a 30 inch draw and it did 275 fps with the same 2315 at 523.4 grains. I' d vote that the DC does pretty well

walks with a gimp

OOpppss, don' t forget about the difference in brace height between the two bows I' d bet that the VFT would be quieter.

pdq 5oh

One thing I' ve noticed with the dual cams is as the arrow gets lighter, they really start to pick up speed. But I think the efficiency of the different cams has some bearing on this as well. My Pat Dually at 55# shoots a 368 gr arrow 288. My P38 DC at 55# shoots the same arrow 278. They both do 301 with a 301 gr arrow. I don' t have a lighter arrow, so I don' t know if the P38 would be faster than the Pat with say a 275 gr arrow.

Matt / PA

Phil (and all)
Actually I have found the opposite with my current 03' Dual Cam models......they seem to be (well according to my numbers they ARE) more efficient with HEAVY arrows. At least compared to my 2001 Pro38 Dual Cam it would seem.
Here' s what I found comparing the 03' Patriot Dually and the 01' Pro38 Dual Cam.

I used the same arrows for each speed test............a 472gr and a 372gr. As you can see they are (drumroll please! 100grs different )

2001 Pro38 Dual Cam:30" /70#
472gr = 289fps
372gr = 326fps

2003 Patriot Dually:30" /70#
472gr = 289fps
372gr = 319fps

I' m not concerned about string load on either bow, because the bottom line is that they both shot the SAME speed with the heavier arrow but one was noticibly slower with the lighter arrow.......which gives a window for comparison.

I' m going to compare them in reverse........vs. the 472gr arrow:
2001 Pro38 Dual Cam gained 1fps for every 2.7grs of arrow weight dropped.

2003 Patriot Dually gained 1fps for every 3.3grs of arrow weight dropped.

Since I' m starting to confuse myself..... I' ll just leave you with the observation that it would appear that the 01' BK cams are more efficient at lighter arrow weights than the current 03' s.
That said.........Only two arrows does not really make a " test" , and the Patriot also has just about a full 1 1/4" brace height advantage.

I wish I still had the Pro38 DC so I could load up a 572ish grain arrow to see if the Patriot Dually gained any advantage in any noticible proportion to what was lost on the light end of the scale.

pdq 5oh

Matt, I guess I wasn' t clear in my post. As is shown, the Patriot shot the heavier arrow 10 fps faster than the P38. The P38 was even with the lighter arrow. To me the Patriot would seem more efficient, as it was faster with the heavy arrow. The birth certs with the two bows showed:
Patriot at 61.1#, 29" , 300 gr arrow = 320
P38 DC at 61#, 28" , 300 gr arrow = 308 (318 at 29" )
Both are very close with the lighter arrow. The Patriot Dually however retains more speed as the arrow gets heavier.