Question about point weight

[travislsullivan]

This is my first go round with Traditional equipment, and have tuned a couple sets of arrows that fly great to my point on with bare shaft, fletched, and broadheads.  PO is around 31-33 yards shooting 3 Under.  Samick Sage #40 DL is 30'' so around #46, shoot off the shelf.  GT Trad XT 400 full length with 100grain insert with 100gr points and Axis Trad 500 30.5'' with 145gr points.
MY question is that I see many guys shooting similar spec bow wise but shot 500-600 spines with 250+ up front.  IM guessing that they are able to shoot those arrow combos due to having a ILF hunting rig and a more adjustable centershot combined with a smoother more dynamic release than mine.  I do see some guys shooting off the shelf using 500-600 with heavy heads.  
I have ran through all my point weights from 100-315 with bare shaft and fletched on the 400 spine arrow but the 100gr points with the 100gr insert flew together at my point on.  Shot them with my broadheads yesterday and they grouped with fletchings, 4-6'' @ 30yds  The broadheads actually were 2'' right of my fletched so a bit weak at that distance.  The main reason I was asking is that I can see some fishtailing on most arrows, its slight though under 2'' I'd say.
I was attributing that to a bad release.
Sorry for being longwinded, any thoughts would be appreciated.

[Cavscout9753]

They may have a shorter draw amd shorter arrows. I stopped messing with carbon arrows a couple years ago but what I do remember is that even fractions of an inch can change a lot. If they were shooting 500 with 250+ up front, they likely had shorter arrows.

[McDave]

Originally posted by Cavscout9753:
They may have a shorter draw amd shorter arrows. I stopped messing with carbon arrows a couple years ago but what I do remember is that even fractions of an inch can change a lot. If they were shooting 500 with 250+ up front, they likely had shorter arrows.

+1. At my draw length of 28", with 29" arrows, I would be using 500's with your setup.  However, I can't imagine anyone using 600's with your setup unless their arrow length was a lot shorter than mine.  Even then, I would probably advise them to use a longer arrow and a 500, because I've found that when an arrow gets too short it starts doing squirrelly things.

Length makes a lot of difference.  I find that 1/4" difference in length is roughly the equivalent of 50 grains difference in point weight.

[Holybeardman]

I've been trying to tune some arrows to my new whip and can't say i've been having much luck.

I'm fairly certain my spine is too heavy.

Shooting 29" Black Eagle Vintage 400 Spine w/ factory inserts and 125 grain tips.

[McDave]

I would be using 500's with that setup, or maybe 175-200 grain points with the 400's.

[JimB]

Holybeardman,I'd be trying heavier heads around 175-200 for starters,

[J. Cook]

30" draw is what sets you apart from the vast majority.  That extra 2 to 3" of power stroke in your draw is why you shoot .400 spine where most would need a .500 spine.

Don't get hung up on "others"...tune the arrows to,the bow and it will tell you what you need.

[Holybeardman]

Thanks Gents.

Will give that a shot.

[Woodpuppy]

I'm using 400's for both my recurve and longbow, I also draw a shade over 30". Longbow is 38# @ 28" and recurve is 45# @ 30". Using uncut gold tip blems, the recurve wants a 125 grain point and the longbow likes a 175 grains point.

[old_goat2]

Originally posted by J. Cook:
30" draw is what sets you apart from the vast majority.  That extra 2 to 3" of power stroke in your draw is why you shoot .400 spine where most would need a .500 spine.

Don't get hung up on "others"...tune the arrows to,the bow and it will tell you what you need.

This and the shelf on a Sage is cut past center requiring an even stiffer arrow spine!