? on if I can weaken arrow spine

[mobiltoy]

I have some laminated shafts that are a little too stiff at the lengths I need.  Can I renock them with the grain on the verticle to weaken the spine and still have a safe arrow?  Thanks, Bill

[Pete Patterson]

I have done that for years to "dial them in" to a particular spine within the overall range when purchased.  It works and I've never had a problem.

[mobiltoy]

Thanks, Pete

[Danny Rowan]

You can always go up in point weight to weaken the spine.

Danny

[Pat B]

Or leave them long. For every inch over 28" you will reduce the spine weight by 5#.   Pat

[vermonster13]

Actually it should be every inch over 26 since they are woodies and most likely spined traditionally.

[mobiltoy]

Thanks,  I have gone up to 160 gr point weight and have settled at 29 inches.  This gets me shooting ok I just was wanting dial these in better and be able to use some of these shafts with another bow that is close in weight.  Bill

[Kingstaken]

Heavier tip is best.
Personally I would stay away from dialing in. No need to have an arrow explode.
Place the nock as it is intended to be properly  installed. I know there laminated, but bad practice is bad practice.

[Pat B]

David, Isn't a 28" arrow the standard but measured between 26" uprights?    Pat

[Kanuck]

What about tapering?  Won't that trim the spine back a bit and give a more FOC balance without drastically increasing point weight?  I've been told that 25gr increase in point weight over 125gr decreases the spine 5#.  Does that sound about right?

[vermonster13]

After World War II with the release of aluminum alloys back to the civilian market, Doug Easton's aluminum alloy arrows slowly took over the market. For some reason, probably having to do with the length of arrow shafting, the standard span used became 28-inches with a shaft length of plus 1-inch to allow for axial traveling during deflection.