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Main Boards => PowWow => Topic started by: Matabele on March 08, 2009, 09:13:00 AM

Title: Axis 400 with 385gr up front...stiff enough?
Post by: Matabele on March 08, 2009, 09:13:00 AM

Hi all,

Could anyone with some experience with these shafts give me some advice. Ive got a 25gr internal footing, 100gr brass insert, 100gr steel adapter and  a 160gr BH/FP. Will the Axis 400 be stiff enough?

The shafts Ive got are full length, how much do you reckon I'll need to lop off to get me in the ball park? Im drawing 28" and the shafts are 32" total.

Also is there a way to remove the nocks without damaging them? I'll cut from the nock end and would like to reuse the nocks if possible.

Any input appreciated. Thanks.

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: Matabele on March 08, 2009, 09:14:00 AM

Oh yeah Im shooting a FireFly 56-57# @ 28".

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: wingnut on March 08, 2009, 09:21:00 AM

Down load the calculator from this thread and run the numbers.  From what I see, your shafts are not near stiff enough.

 http://tradgang.com/noncgi/ultimatebb.php?ubb=get_topic;f=1;t=071556

Mike

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: James Wrenn on March 08, 2009, 09:21:00 AM

You will get all kinds of relies on this and I can't help except for suggesting you not load all that stuff into but one shaft.Will be a shame to screw the whole dozen up hoping something will work. jmo

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: Guru on March 08, 2009, 09:25:00 AM

My opinion is they won't be....if you draw 28",then arrows will have to be a little longer......maybe get away 300grs....but I doubt even that....

One bow I shoot is a 58# curve at a tad over 28" and my 400 series shafts will only handle about 250-260 up front at best......

Everyone is different though....but I think a better starting point would be a 340 spine

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: Matabele on March 08, 2009, 10:08:00 AM

Thanks for the info guys, thats a pity I guess I'll have to drop point weight, maybe change out the steel adapter for a alu, and see if I can get it to work.

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: Hattrick on March 08, 2009, 10:27:00 AM

I`m with Guru, i`m shooting MFX 340s with 250 up front out of 58# longbow they tune perfect

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: J-dog on March 08, 2009, 10:55:00 AM

I am shooting a 55# curve axis 400 with 225-260 up front,28.5" arras. Does great - have tried more - not done well.

J

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: texbow2 on March 08, 2009, 11:10:00 AM

I get the 400's to tune with 350 up front so you may not be too fat off, but I only draw 27.5 and arrows are cut to 28.

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: texbow2 on March 08, 2009, 11:11:00 AM

my reply for 55# acs and 56# silvertip

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: Matabele on March 08, 2009, 11:13:00 AM

Thanks for the info Hattrick and J-Dog. Seems I'll have to drop point weight.

Been playing with that spine calculator, its great! Wish I had known about it earlier would have saved myself some money  :)

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: Matabele on March 08, 2009, 11:15:00 AM

Must have been typing at the same time texbow2. Your results are interesting as the ACS would need more spine than general.

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: wihill on March 08, 2009, 01:46:00 PM

That spreadsheet is great!!  One question, what input is the AMO spine input looking for?  I tried the spines as listed from the manf regarding carbons (.500, .400, .340, etc...) and get some weird values...


Thanks!

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: wingnut on March 08, 2009, 01:55:00 PM

you need to convert the deflection reading to the spine poundage.  I had a spreadsheet here someplace that did that.  I'll look around.

Mike

Title: Re: Axis 400 with 385gr up front...stiff enough?
Post by: wihill on March 08, 2009, 05:48:00 PM

Thanks Mike!