I just put some new 60X strings on my Bowtech Amplify. Went to the range today to get my sight zeroed in and throws some arrows down range. After only changing the strings, everything else being the same I was shooting groups 6-8 inches high. Not sure why it surprised me but I didn’t expect that big of a difference.
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New strings surprised me
- Thread starter Andrew920
- Start date
I noticed something similar this year. I have two identical older Elite E32's (2014/2015). Last year I replaced the strings on one of them. The result was a noticeable difference in draw weight between the two. There must be more string stretch there than I thought there would be.
I think I had some stretch, but I also was thinking that the difference was most likely quality of the strings
MMN Outdoors
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New strings/cables every 2yrs. is what I adhere to. It does make a difference....
Possible you slightly changed your peep location? Or some other anchoring point?
Or nock point slightly lower than previous string.
The lengths of the new string/cables will usually be a little shorter than the old set. Plus, the aftermarket string/cables diameters are usually a little different. This will change the draw length a little. The peep height will usually change a little. The nocking point and D-loop length will change a little. This is common and not a concern. Just a small difference in loop length or draw length will change how you sit behind the peep and that alone can make a noticeable difference in the POI.
You can shoot a friends bow and a most of the time, you will have a different POI than your friend due to having a little different draw length.
You can shoot a friends bow and a most of the time, you will have a different POI than your friend due to having a little different draw length.
elevatorman
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It's axle to axle length I bet you. Your old strings were probably stretched and ata was too big, meaning draw weight and arrow speed went down. New strings may be closer to the correct ata picking speed back up.
My new bowtech sr350 this year I got it home was around 33 1/4" ata. Spec says its supposed to be 33. I had to twist the cables to get it back down to 33 where it should be, and wouldn't you know it, as soon as I was at 33 even it was shooting ibo speed. When it was a 3/16"-1/4" big I was 8-10 fps below ibo.
I think this also has to do with YouTube reviewers saying a bows not meeting ibo speed. They never say whether they made 100% sure the brand new strings hadn't stretched and ata was perfect. Seems like the reviews neglect an important thing to check when talking about a bows speed.
My new bowtech sr350 this year I got it home was around 33 1/4" ata. Spec says its supposed to be 33. I had to twist the cables to get it back down to 33 where it should be, and wouldn't you know it, as soon as I was at 33 even it was shooting ibo speed. When it was a 3/16"-1/4" big I was 8-10 fps below ibo.
I think this also has to do with YouTube reviewers saying a bows not meeting ibo speed. They never say whether they made 100% sure the brand new strings hadn't stretched and ata was perfect. Seems like the reviews neglect an important thing to check when talking about a bows speed.
TreeRecon
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I'll also add the YouTube guys are not using super accurate equipment. Ex: Lots of the off the shelf draw weight scales read high. This also contributes to lower speed tests
Could be. Feels the same to me but I suppose even a minor difference could affect it.
I did. I shoot 65#. I had to let the bow down a bit when I first got it back because with the new strings it was at 69. I shot after I got it to 65.
That’s interesting. I never thought of that. I didn’t measure the speed of my arrows, but non scientifically they definitely sounded different than when my old arrows hit. More of a thump.
Twisting cables shorter increases poundage and adds draw length. That's where the increase in your speed came from.
To the OP, increased speed isn't the reason you're shooting 6 to 8 inches higher.
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There's too many variables to acknowledge to list them lol. It's all stuff that becomes routine when you do it enough, otherwise "perfection" isn't "identical"! That and the fact that everyone's' "perfection" is different... Installing properly (just), tuning, setting factory spec, and duplicating "spec" are all different scenarios/processes...
elevatorman
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I also twisted the string to keep draw length correct. There's also timing marks on my cams that give another reference to keep things right.
The extra speed came from the correct ata length making the preload on the limbs right. I didn't get extra speed, just got back what was lost from stretched strings
elevatorman
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If speeds not making the difference for poi, peep location and d loop location would move it too
elevatorman
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I consider periodically checking ata and adding a twist as necessary to keep ata right as bow maintenance. Keeps everything consistent