I am not impressed thus far with this bow as far as speed goes. It is a smooth shooter. Not real fast like others say. I shot some GT5575s with 125gr tips out of this 64"ACS-CX, 52#@28" and it chrono'd at 170fps. I don't think this is slow by any standards...just not fast. It seems like when I had the 60# limbs on it it wasn't any faster either. I am using the chrono at the local archery shop so I know it is right on.

What did the arrows weigh? How far are you drawing?

Just curious, what is the total weight of your arrows?...Mike

I am drawing at 28"...had the guys at the shop check. The arrows at GT5575s at 29.5" long with 125gr tips. The heavier tips made the arrows fish tail...? So, I went down in weight and got much better flight...which I don't like either! I have not weighted the arrows. But I know they aren't over 500gr.

Depends on how many grains per lb.and your actual draw length. Speed is a + but not the most important thing.

I agree Crooked Stic. But I am just surprised at the difference in performance numbers. I read how some of 180fps up to 190+fps. Then with a 28" draw and arrows that are about 9gr per inch I get 170fps...?

That arrow would weigh right around 400 grains +/-, which would put you a bit under 8 grains per pound.  170 does seem like a very low number for that bow at least with the ones I've checked.

But then again I've got a draw lenth that is pushing 30" so that will add more fps right there...  And I'm shooting 14 strand TS1+ strings too, so that will add a few more fps...

I believe the new CX's are being supplied with a 14 strand Rod Jenkins string, so the string can't be the problem.

That arrow cannot be much over 400 gr.   With that bow weight and your draw, 170 fps is below average...or should I say, I would have expected  more (185-190 fps?)

Maybe try another chrono.  They do mess up from time to time and vary between each other as far as fps.  Heck, with a 26" draw I'd be happy with 170.

Blackys review in TBM had the ACS-CX at 193 with fingers and 9GPP. That would be 468 gr. arrow for your 52# bow.

They get a 12 strand Dynaflight '97 string.

I'd cross-check on another chrony and/or compare with another bow on the same chrony.

Chad

One thing to watch out for with chrons is that you have to have straight arrow flight to intersect the shadow detector with the point of the arrow.  If it's going sideways at all, you will start it on one end with the point and shut it off midshaft on the other.  It will give you crazy numbers.

Mike

Redant 60/65 just bought 2 A&H  64" 54@28 and 60@28 both shooting 480gr arrow, he draws 27+ they went through at 193 and 198 time and time again......They are both over 200 at my 29+ draw. he just received a new chrono....Mark

Hey Snag, don't know what your problem could be, could be a bad chrono reading. My ACS 41@28 shooting a 362 grn. easton arrow consistantly reads 203 fps all day. I had my friend shoot it and at his 30in. draw got 207, 209, 207. I pull right on 28" and have my brace height set at 7 1/4.  I'd check the chronograph. I don't know what my new 43lb. one shoots. I'll chrono it this weekend. Rich B.

I just chronographed my 62" 60#@27 A&H ACS CX w/ 525 grain arrows at 202 - 210 fps and my 58" 59#@27 Centaur Double carbon w/ same arrow at 204-216. So, youre numbers are low. Recheck chrono.

I am surprised that the GT5575 fly better for you with the lighter head. I use those with 175gr BH's and another 30gr weight inserts for a 30" arrow with my 66#@29" draw Acadian Woods. See what speed you get going down to GT3555's.

Snag,
I would check the chrono because you have to be getting some serious power out of that 52# bow to have to shoot 55/75 GT's out of it with only a 125gr point.

Comber.

I agree with Comber,  That shaft should need more weight up front for a #52 bow.  If it is shooting well with 125s you are putting out some awesome power.