skinny string weak spine

[Mryan2176]

Hey all,
I've been shooting quite a bit the last month and just started tuning my K mag up for deer season again. I didn't think I would have to mess with anything, but the 10 strand SBD string I bought seems to have made my arrows too weak. I'm shooting 29.5 inch cx heritage 150s with standard insert and 250 up front. I am amazed at how much difference the string has made in speed. I'm sure in reality it isn't much, but it sure seems like it. Would building out my strike plate slightly be my best option? I love the arrow weight where its at, and the bow is super quiet with just a couple little cat whiskers on it, so I don't want to mess with brace height. What would be the easiest way to build out the strike plate? Also anyone have real word fps numbers on a normal string vs a skinny one? To me it seems to be quite a difference vs. The D97 that came on the bow. I draw the bow to 28.5" so I want to avoid cutting as well.
Thanks, Matt

[njloco]

What's the draw weight at your draw ? I shoot 1535's with around 300gr up front cut to 29" but, I only draw 26.5". The heratige arrows, while being a 500 spine arrow also, are a bit thicker walled arrow.

If showing weak spine, I would try going down 25-50gr, that would still be plenty for deer sized animal. Those are good arrows, I think better than GT's.

[katman]

Yep, build out strike plate a bit to keep current shaft and point weight.

[LBR]

Building out the strike plate should fix it.  Shouldn't take much.

 

Also anyone have real word fps numbers on a normal string vs a skinny one?

Depends on what you are comparing.  

With equally well made strings, 5 fps is huge.  String material just doesn't weigh that much.  

You will pick up a lot more just by working on your release;  about as much going from a tight fitting nock to a light snap.  Dropping the brace height a bit can give a slight increase.

That's generally speaking.  There are always exceptions and lots of variables folks don't think to consider.  A chronograph is the only way to tell for sure, and take into consideration all the other variables.

[Fletcher]

The fuzzy loop part of Velcro works well as a side plate.  You can build multiple layers or put a little leather underneath.  1/16 inch should be enuf.

[Mryan2176]

Thanks guys, I worked on it today and got them shooting much better. Bareshafting just shows a little knock high now, I'll sort that out tomorrow. I'm not sure on the bows weight at my draw as i don't have a bow scale. I'm only drawing half inch over 28, I'll have to take the bow to the archery shop in town sometime and have it measured. I added a small piece of plastic under the strike plate and that did the trick.
Matt

[MR BILL SHORTY]

   

[Tajue17]

oops removed my post where I just saw you fixed the problem.