Arrow weight question

[Petrichor]

So here is the question. I have bear grizzly 55lb @ 28. I draw 26" I know I need a 400 spine arrow. The place that got it from gave me 6 beeman center shots cut to 27.5 inches and weighing 426 grains. Tips weight 125 and I have matching Magnus stingers. Now the beemans weight 9.6 grains per inch.  My local shop doesn't carry beeman arrows but has easton that way 9.8 grains. It is so little difference can I cut then same length or do a lot if testing? Now I would love to save money and wood arrows seem cheaper but it it's a can of worms I know nothing about. Can anyone point me to a resource about them or explain spining? And everything I would need to tune my own bare would shafts.
The wood shafts I see don't show weight so what gives? Any help would be great..
Appreciate all your wisdom

[Wheels2]

Woods are heavy.  Figure a bare shaft will run between 12 and 14 grains per inch.
I am surprised that your bow takes such a stiff shaft.  I shoot 52# @ 28" and shoot .400 Aftermaths at 29" with 125 tips.  They are just a tad stiff for my Borders.
A 145 tips makes them bare shaft a bit weak.  If I had not cut the shafts, I would have been able to get them perfect with another 1/2" or so of shaft length.

[Petrichor]

I don't know that the arrow is correct just what they recommended.

[Mryan2176]

I would guess those arrows are extremely stiff. If you want a cheaper arrow with some weight to it try some 2018 aluminums. They are tough for aluminums and have nice weight to them.30 inch center shot 400s are stiff out of my 55 pound recurve with 225 grains on the front, and they are 30 inches long. A 400 centershot cut to 27.5 inches is a very very stiff arrow. Aluminums are nice, you can cut them yourself easily and they are cheap. A 2018 cut to 30 inches with a 125 point weighs around 540 grains. Don't be afraid to leave your arrows a little longer. Bareshaft tune and see what length you end up with. I am also assuming your draw length is less than 28 inches. Don't rule out 500s if you stick with carbons. Remember carbons get stiff very fast as you cut them. Start full length with whatever shaft you choose and let the results dictate what length arrow you end up with. If you intend to hunt, I would shoot for a finished arrow weight of 9 to10 grains per pound, 55lbs = 550 grain arrows. It's not a set rule, but most of my bows shoot even sweeter with arrows in that weight range and pass through deer easily. Good luck and enjoy, nothing like shooting a stick bow.
Matt

[creekwood]

Don't confuse arrow weight with spine stiffness.  Two different things.

[Stump73]

I agree your arrows are to stiff. Your next set of arrows start off with full length and cut them down if they are to weak to stiffen them. Your gonna need more weight up front to weaken your shafts you have now.

Originally posted by dahyer:
I don't know that the arrow is correct just what they recommended.

If it is "just what they reccomended" thien it is more than likely NOT correct. The only way to know for sure if you have the correct arrow is thru tuning.

Find an experienced trad shooter in your area who can teach you how to tune!

Bisch

[Cavscout9753]

All I'll say about the .400 spine arrows is that yeah they're gonna take a ton of weight to weaken them up a bit. I went down this rabbit hole once too. After screwing in 250 grain tips I just gave up. That as much weight as I was messing with. A 500 spine carbon arrow is very versatile. Carbon stiffens up FAST when you trim it down. I just walked away from it all. Wood arrows suit my temperment. I find them easy to tune (some people disagree and stear newer shooters from them, no argument from me, they make good points). Cedars break "easy" but not that bad. They take straightening pretty often but once you get the trick of it its pretty quick and easy. Now doug fir are tough arrows and they stay straight. In both cases I get heavy arrows without going too crazy (for me) with tip weight.

[rolltidehunter]

U need 500 spinned  arrows. Arrow tuning can get frustrating. Good luck

[Producer]

Like most are saying you got some bad advice. If you take a 400 carbon arrow and hack off 4.5" what you have is not a 400 arrow anymore. 500's could be a little on the stiff side it you take off 4.5".

[Petrichor]

So I went back to the company and asked why they cut so short.  They advised me that they did fire shafts through the bow until they found one that flew right. THey said that they shot 30 inch through the eventual 27.5 and that the 27.5 flew perfectly.  I have to say after putting a few more arrows through it that they are flying really good and straight.  However I look forward to my next batch of arrows that I will cut and tune myself. Time will tell but these will work for now.  Check out IN Love thread for some shot pics.  HOwever do note that some of these arrows where shot from different angles in the yard practicing walking seeing nocking and firing at various distances.  I will followup when I buy and tune my next arrows.

Thanks everybody for the input.

[BWallace10327]

Plug your numbers into the three rivers spine calculator.  Its not always perfect, but its very close alot of the time.  Its free, quick and you can play with alot of different arrow shafts, lengths, point weights and other factors.

[wislnwings]

Something that helped me was to borrow a couple arrows from friends with similar setups and see how they flew from my bows.  Helped get me going in the right direction without buying a bunch of arrows that might not tune right.