Speed Gain on String Change

[NYSKIER]

Just changed strings on my bow and noticed a large point of impact change. It's kinda blowing my mind. Everything is in spec and it's shooting bareshafts and fletched perfect at 20. Anyone ever experience this before? That seems like a big gain to me.

Edited out the fps because I was flying in from space on that one (I blame lack of sleep from kid #2) and the reason for the issue was just poi. I slid my sight up and everything was in line no adjustments to the tape or anything

 

[homebru.trout]

That's higher than what I have seen historically but why argue with the numbers? Materials and build style, number of strands, etc can all impact speed. It's likely that paying close attention to setup and basic tune when replacing the string may have influenced that number as well.

 

[NYSKIER]

I was thinking material and stands possibly. Curious to test further but was very intrigued from the early results. Was able to hit almost dead on at 50 with my 35 pin dialed on my slider and my fixed 30 pin was hitting at 40.

 

[JStol5]

Stock strings lose poundage FAST. My bow tech went from pulling 73 and change to 71 in 3 days on stock strings (really tells you about their quality). This was without touching the limb bolts at all, just the strings stretching.

Just ordered in ABB. I bet they'll pull around 74.

 

[homebru.trout]

I was thinking material and stands possibly. Curious to test further but was very intrigued from the early results. Was able to hit almost dead on at 50 with my 35 pin dialed on my slider and my fixed 30 pin was hitting at 40.

The switch from 35 to 50 is extreme and likely not due to fps changes by itself. More likely scenario is that it is due to variance in peep location and nocking point when you changed the string. Small changes in either or both will substantially affect POI.

 

[Kularrow]

No string will do that period, if it did it would corner the market in sales or wear our extremely fast. With that said, I bought some Gas XV which have only lost 1.5lbs from 74 to 72.5 and has stayed there with proper string maintenance but I did have quit a bit of peep rotation at first.

 

[Mighty Mouse]

I'm guessing your old cables had stretched a bit and you were a little light on draw weight. Your new cables brought draw weight back to spec and increased speed.

 

[Lowg08]

Sounds reasonable if the old string was really stretched and the bow out of tune maybe. Just now put back in line

 

[NYSKIER]

Agree with everything everyone is saying but I measure everything out when redoing strings. Everything is within a sixteen of an inch of where it was. It was 100% in tune prior to change I had fixed and field points together out to 80 and mechanicals with field points at 100. I’m going to guess that sixteens of an into or so must be the difference for the big poi change and I probably only gained marginal speed

 

[NYSKIER]

No string will do that period, if it did it would corner the market in sales or wear our extremely fast. With that said, I bought some Gas XV which have only lost 1.5lbs from 74 to 72.5 and has stayed there with proper string maintenance but I did have quit a bit of peep rotation at first.

Strings are actually Ghost XV!

 

[Billy Goat]

10-15 fps is less than an inch at 40. So if I'm reading things correctly, and you picked up 15 yards, you gained like 150 fps.


You can gain fps from different strings, it's a matter of weight. Less weight makes for a faster setup. Dye in fibers is weight, wax is weight. A 22 versus 24 strand is a weight difference. At most you might get 8-9 fps, but that doesn't make the difference you are describing. I believe you probably changed your peep height and it made the difference.

 

[NYSKIER]

10-15 fps is less than an inch at 40. So if I'm reading things correctly, and you picked up 15 yards, you gained like 150 fps.


You can gain fps from different strings, it's a matter of weight. Less weight makes for a faster setup. Dye in fibers is weight, wax is weight. A 22 versus 24 strand is a weight difference. At most you might get 8-9 fps, but that doesn't make the difference you are describing. I believe you probably changed your peep height and it made the difference.

Thinking with a sane brain and using math you are right. My 10-15fps calc was coming from outer space! I’m going to call dummy on me and just chalk it up to lack of sleep from my latest little guy. Appreciate you fixing my brain scramble

 

[Billy Goat]

Thinking with a sane brain and using math you are right. My 10-15fps calc was coming from outer space! I’m going to call dummy on me and just chalk it up to lack of sleep from my latest little guy. Appreciate you fixing my brain scramble

It happens, I get there a lot.


I ain't got good reasons for it, aside from just being reforking stupid.

 

[MattB]

POI change when changing out cabling doesn't tell you anything meaningful. I think once you re-sight you will find that your tape is still very close to accurate/your bow is shooting pretty much the same speed. No matter how hard you work to get the peep and loop back in the same spot, they will vary slightly. Add to that the potential for slightly different nock tension due to string thickness and difference in pressure on the nock from the loop, and the 1/16" difference in bow specs and the minor differences in poundage/timing/synch/nock travel that result, I think you will learn you are taking the POI change as an indication of something that isn't.

 

[NYSKIER]

POI change when changing out cabling doesn't tell you anything meaningful. I think once you re-sight you will find that your tape is still very close to accurate/your bow is shooting pretty much the same speed. No matter how hard you work to get the peep and loop back in the same spot, they will vary slightly. Add to that the potential for slightly different nock tension due to string thickness and difference in pressure on the nock from the loop, and the 1/16" difference in bow specs and the minor differences in poundage/timing/synch/nock travel that result, I think you will learn you are taking the POI change as an indication of something that isn't.

Will report back after I get my tape straightened out

 

[Read1t48]

Not to detract from the thread, but I have been wanting to change out my string for a newer one in hopes of increasing the poundage. I am maxed out on an older Mathews. I believe it is running about 72 pounds or at least was when the string was newer. Any tips or tricks on how to increase poundage with a string or otherwise without exaggerating, my drawl length, and messing up my anchor point?

 

[nphunter]

Not to detract from the thread, but I have been wanting to change out my string for a newer one in hopes of increasing the poundage. I am maxed out on an older Mathews. I believe it is running about 72 pounds or at least was when the string was newer. Any tips or tricks on how to increase poundage with a string or otherwise without exaggerating, my drawl length, and messing up my anchor point?

It’s all give and take. You can’t really change one thing without others changing. If you shorten your cables you increase pressure on the limbs which results in higher draw weight but it also increase draw length slightly. You could twist up the string but honestly that’s not going to gain you much. I would either twist them up now, find the draw weight you want, twist the string way up to get the draw you want and then pull it all, measure it and have new strings built to those specs.
Honestly I believe that draw length and shoot ability trump draw weigh every time. I just adjust the other things and my draw weight ends up being what it is, sometimes less than factory and sometimes more. No reason to mess up how a bow shots just to gain a pound or two.

 

[Read1t48]

@nphunter …great advice. Thank you.