Was the 75 percent mod position actually 75 percent when measured? My SVX doesn't have much valley either and when you lengthen the cables, it shortens the valley more. Something isn't adding up. I drew back the CX and didn't notice a short valley.

 

Drawing it back and shooting it are two different things. Real world numbers:

65% setting = #54 draw /#12 holding equating to 66% actual let-off.

70% setting= #54 draw /#15 holding equating to 72% actual let-off.

75% setting= #54 draw /#12 holding equating to 78% actual let-off.

 

I have not shot the concept x… I want to though! Did you try with the spec mods I read about???
But I will say I like the spiral and svx cams for past 20 plus years…. Maybe you just got that bow “unstuck” and outta my head🤔👍

 

Sorry re-read your post and you did try them…. It’s probably a great bow but we’re just used to what we’re used to is all…

 

The cables from the factory were not manipulated except to fix the timing. When I lengthen the cables on a SVC bow it allows for a smoother draw as well as provides a higher holding weight percentage for my lower poundage bows. Now, as stated, I could have played with twisting the cables up to provide more of a valley in the 65% position however it would have in turn produced a higher let-off percentage than the desired 65%.

 

Too old to shoot a new bow that feels like a 20 year old spiral cam.

 

Oh so it does feel like factory spirals/svx… sweet. You had me confused. Now I have to shoot one.

 

No not at all. They feel nothing like the old spiral… or SVX. That’s with CDM and SPEC Amos’s.

What he is experiencing is nothing like what I experienced and I got mine the week of release and have done everything imaginable to my cams as far as setup goes.

I’ve helped 10-15 people purchase and setup one already… not one person has had this experience

 

Feels like the old, original spirals that wanted to rip you forward with no valley. Nothing like the SVX that was recently discontinued. I could manipulate the cables on that cam and make the bow an extremely comfortable cam to draw and shoot.

 

Big difference between the Bronze Spiral Cams and the SpiralX Cams and a huge difference between the Bronze Spiral Cams and SVX Cams.

 

Guess I am just going to have to shoot one! Oh darn. I can get along with most cams with some time behind them and around 65-75 letoff works for me- I find the spiral cams smooth all the way thru with hard wall that makes you shoot strong with clean release… don’t like to pull hard and dump off into wall. Cant wait to try the concept

 

Your gonna be fine with the cam. It’s nothing like being described… NOTHING like it. Trust me lol

Cams are still super smooth all the way… easier drawing even then SVX. Closest thing to it is probably the old C2 cam.

You still have to shoot a strong shot… but that’s kind of a given. 60lbs though… doesn’t feel like 60lbs. When i took mine out of the box it was set at 28.5” or 29” and it still felt like 52ish lbs. But my scale said 62lbs lol that was not it time and my DL is 27.75”

 

Do what you will guys, thought I may help out and share my experience but, apparently I am the a**hole, with a NFAA silver bowl, who doesn't know anything. I'm out.

 

lol don’t know how or why you jumped to that conclusion…

 

I thought your post was pretty good, myself. Thanks for your input.

 

Correction:

65% setting = #54 draw /#17.5 holding equating to 66% actual let-off.

 

That being said the Concept x cams, straight from the factory, were unshootable; with the let-off foot set in the 65% position and not much better in the 70% position. There was zero valley! When I put the foot in the 75% it provided enough valley but, no way in hell am I going to shoot #13 of holding weight.

You sound surprised. If I understand "valley" correctly it would imply that poundage held would remain the same for some defined distance, however short that may be.

Any bow that uses cable stops to adjust let off will not have any valley in anything but the highest let off percentage. It will be ramping up to full poundage at any reduced let off setting. The only question is how fast is it ramping up.

Taking a close look at the foot suggests to me that the feel of 70% let off and 65% let off should be about the same as the adjustment of the foot appears to be the same. For a 60# bow the holding weight ramps up 3 pounds when making the change from 75% to 70% as well as the move from 70% to 65%. I do wonder how quickly it ramps up when at the 65% setting and I wouldn't be surprised if it ramps up more quickly.

 

I got my ConceptX last week, after having shot a Stratos HBT for a year and a half before that, and a Surpra SE before that. The Concept out of the box, at 75%, and 53# (it's a 55# bow), felt like it had ZERO valley. I usually shot the stratos at 70%, and it seemed to reach near the bottom without actually hitting the floor. I don't want it to 'thunk' into the valley, but stop just short of that. The Concept was much more aggressive than the stratos (I realize "aggressive" means different things to different people), but I found this bow difficult, even with the "tweener" feet at 77%, the letoff measured between 67 and 69%.

I looked up how to twist the cables to get more letoff, and the chart said to add twists the cables. I also noticed that the chart said it would also decrease the ATA, and increase the brace. So before making that change I measured both, and noticed the Brace was only slightly short (by such a small amount I would round it up the the 7.25 spec). However, the ATA was about a quarter inch over the 40" spec. So I added a twist to each cable, measured, added another, and that brought the ATA back to 40", the brace was dead on at 7.25, and most importantly, the falloff was now closer to what I would expect from the longest setting. It's still measuring about 73-74% with the 77% foot, but MUCH better than the way it came from the factory. Without making that change, I would not have been able to shoot it comfortably at all (and I don't relax at draw, I've always pulled hard into the wall).

I really do think it was incorrectly setup at the factory. I haven't measured the draw weight with the limbs maxed out, so I should do that to see where it is now.

 

To add to the above, I just checked again, being careful to not to over crank when the stops hit the cables, and my letoff measurement is now dead on (or as close as it can be hand cranking the draw board) compared to the actual stop setting. This is AFTER adding 2 twists to each cable, and brace and ATA are now matching the spec. Note that I am running 2 turns out on a 55# bow, resulting in 53#, using default mods at the max draw setting. I do have a set of spec mods, and will try them out at some point.

I wound the limbs in all the way and it measured 57.5... I have no idea what the norm is. I doubt people would complain if the bow is a couple pounds over, but they certainly would if it was under.

 

My 60lb bow measured 61.1lbs fully wound in. There's almost always a little headroom above the stated weight.

 

Excellent read, glad it is working out for you. I lengthened my draw just a bit and it has greatly helped when shooting in the 65% mod. The result was a nice sub 2" group at 60 yards. It is definitely a more demanding bow then what I am use to but, with more time I suppose I will grow accustom to it.

 

Had mine a day and sold it to another member at the club.

I lengthened my draw just a bit and it has greatly helped when shooting in the 65% mod. The result was a nice sub 2" group at 60 yards. It is definitely a more demanding bow then what I am use to but, with more time I suppose I will grow accustom to it.

??
Did you sell your bow to another member of the club or did that not happen?

Another update: I put the Spec mod on and set the let off at 65%. It felt very similar to the CDM mod at 75%. When comparing the CDM mod versus the Spec with both mods set at 65% there is definitely less valley with the CDM. I will be sticking with the Spec mod at 65% for the time being. This combination holds really, really well.

 

Good info, I didn't see much difference between the mods. I didn't sell it, still playing with it.

 

I have two, a 37 and a 40. Silver Bowls? Are we counting? 😂😂😂 I echo what Darrel says. I’m holding 21 on them set at 65% and nothing… nothing close to a spiral, nor the svx. I’m using the draw specific spec mods on both. Set at 28.25 dl. I’ve sold two Stratos and a Reckoning 39. Trying to sell my last Stratos and my old faithful Reckoning 38 to get another X 37 to have a backup ASA rig. Will this cam with the spec mod yank if you get lazy? Yep. Not like the old spiral did.

 

I bought the 40 and have shot several 37s and FXs. I've shot with both mods and felt nothing similar to your experience. The Concept X has an incrsmooth draw cycle and the let-off is easily managed. It sounds like your bow was shipped out of specs from the factory.

 

Thank you for sharing. Currently shopping and this was an interesting read.

 

Concept X 37 owner here. I've used both mods and ran a lower let off than I normally would and haven't experienced any issues. All of my testing was done with a draw board and scale to verify peak weights, holding weights, let off percentage, ect.

When I went to the lower let off setting than I would normally use I was actually impressed. I measured things on the bow two different times to make sure the numbers matched what setting I placed it in because it was smoother/less aggressive than I've experienced in the past from other brands.

The SPEC mods are the smoothest on the draw cycle and the valley still feels solid without being aggressive for a target bow. Nothing out of the norm and would be a little less aggressive than some brands and a little more than one or two brands that are just really relaxed on the backend.