Adding weight to inserts

[savagelh]

I shoot 50gr brass inserts on my hunting arrows but recently bought another dozen shafts to get ready for hunting season. My question is what is the best way to add mass to the factory aluminum inserts? Can I just screw a 40 gr 8/32 screw in the back of the insert and be good to go? They are ce inserts and arrows and are threaded allege way through.

[Orion]

that would probably work, or buy heavier brass inserts.

[Possum Head]

Sounds like a good idea!

[savagelh]

Buying heavier inserts is not an option right now. Takes 6 weeks to get anything from 3 rivers and the US/can$ exchange rate is ridiculous.

[M60gunner]

I have used 8/32 brass screws to add some weight to shafts. But I made a slight error. The pieces were to long and made a weird noise when I shot the arrow. I have read it was a vibration of the long screw? Those screws are not as heavy as an insert?

[6feathers]

I just go to the local hardware store and buy machine bolts that fit the threads and just thread them into the back of insert add a little glue...set to go.  Longer screw more weight, shorter screw less weight (I also cut the head off of the screw).  You need to make sure that you do not put the bolt in too far, make sure your target point or BH will screw in all of the way.

[JimB]

Just remember,weight behind the insert has less influence than weight more forward.The further it extends back,the less.Mark the balance point of your existing,tuned arrow.When you add weight,keep your balance point the same.If you move the balance point,assuming shafts are identical,you change the tune.

You probably need app. 35 grs.I'm not sure how long an 8-32 screw that would take.Maybe you could use a shorter screw and wrap thin solder around the threaded portion.At any rate,I'd keep it as short as possible.

[savagelh]

Thanks guys,for anyone interested, I used 8/32x1" screws that I had on my work truck (I'm an electrician) and ground the heads to .240" I put the screws in a broken shaft and put the shaft in a cordless drill and spun it on the bench grinder. Took about 10 seconds a screw and I ended up with pretty concentric heads. I wanted the heads tight in the shaft so when it spins it doesn't wobble.

[savagelh]

I then glued the screws into the back of the inserts and spun the threads in 2 full rotations. I ended up with 49.5 grain inserts and the length is only about .4" longer than the brass inserts. I don't think I will be spending $20/12 on brass inserts anymore. The shafts spin well and the bare shafts shot true.

[TOEJAMMER]

I used the brass 8-32 threaded rod purchased at the local hardware store, cut it to length desired for the weight desired and threaded it into the insert.  I put some foam over the rod and inserted it .  It eliminated any vibration.  Works fine and doesn't change the spine.