Special Interests - Groups & Societies > BROW
Finding the "sweet spot"
Dai.S.Loe:
I may be preaching to the converted here but I thought I would pass this along to those interested.
A projectile passing through a barrel sets up vibrations.
The study of such vibrations is called harmonics.
There will be a spot on your barrel that oscilates less than the rest
This is the sweet spot.
If you are using cross sticks for your shooting or a rest it would be best if you place this " sweet spot' on the sticks.
Simple way to find the sweet spot. Especially if you have an octagonal barrel.
Dust the top of the barrel with lots of talcum powder.
Then in a standing position with no rest, fire the rifle.
The oscilation of the barrel will either throw the talc off or move it to the sweet spot.
Where there is the largest ammount of talc left is approx the spot.
Mark this spot somehow, i was told to use thin masking tape.
repeat the process a few more times. you shoud now have discovered an area where the talc seems to stay when the rifle is fired.
This is the place where you should rest the barrel on the cross sticks or rest.
There is less vibration or oscilation at this point and therefore you shoulds get less jump or disruption of the projectile when using sticks.
I hope i have explained this properly and that it makes sense. Also I hope I am not as I said, preaching to the converted\.
Dai.
gw:
Had not heard of this method before Dai, I've always just shot groups to determine it. Some rifles seem more sensitive to this than others, which makes some sense I guess. Have to give it a try sometime, just not on a windy day!
GW
Silver Creek Slim:
Thanks, Dai. I'll have to try it.
Slim
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Four-Eyed Buck:
Hmmm, interesting.......... 8) :o ???
john boy:
Dang Dai ... this is super! All along, I been beating the barrels with a hard rubber hammer and listening to the harmonics.
Fer sure ... copied your post into my references.
Cheers
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