I got a new longbow left-handed 60 pounds 62 inches long. I'm going start tuning my arrows to this bow. They are currently used for a a 60 pound recurve. I can tell that most my arrows will be able to be used with the longbow with a few small adjustments. I shot them with reasonable arrow flight. Now with my recurve I never really got my arrows up to a good hunting weight they were approximately 440 grains. most of them are spined with either 340 spine or 400 spine. some of these arrows I was given as a gift and some I found on archery ranges as I was not sure and have to spend lots of money on matched arrows at the time. so my question is with a 30 inch arrow at 400 spine on a 60 pound longbow I want to get up to close to 600 grains. my arrows are close now but if I add 100 Plus grains to it I feel like I'll have to go stiffer. also this is the first time I will have tried to bare shaft and arrow.
You didn't mention your draw length. If you have a little arrow length left you can play with that will be a plus. Also, are both bows cut the same distance from center? If the longbow is cut farther from center, that will also have a bearing.
As you can see from my list of bows, I play in a much lighter league than you, so I can't offer any specific advice, but I think this info would make it easier for those who draw a heavier bow help you.
You can add weight to your arrows by filling them. I've used bailing twine, rope and weed eater line. This adds over all mass weight. I find the stiffness of weed eater line can affect spine some. Twine and rope really don't.
You should easily be able to put an extra 150 up front with the 400's. More than that with 340's.
Thanks guys I don'tave a feel for how much weight it takes to significantly change the effective spine of the arrow. My draw length is 29 inches, so I should have some to play with. I tried stuffing an arrow with rope last week but I did not get the Rope packed enough and it shifted in the arrow upon impact. I will have to experiment more with that.
I shot a few of my 340 spine arrows today bare shaft. I shoot left handed and I was getting a pretty pronounced nock left position. Now I think that means, my arrows are too stiff and I need to add weight. So next step is to get some heavy field points. I am going to get a range from 300 to 150 grains. The nock was about 2.5 to 3 inches to the left of the point of impact. Any predictions on how much weight it will take?
For a right hand shooter nock left I believe is weak. So for a left hand shooter a nock left would be stiff.
yes sir that is what I have read. Ordered a test pack of points from bigjims.
300 g should be close
Agreed a test pack of points will save you tons of problems. I never had luck with weight tubes. String or rope. It always caused unstable flight for me. My setup is gt velocity 300s at 30.5in I use 300gr fieldpoints. And 1.5inch aluminum footer up front.