trajectory ?

[bowfanatik]

I'm just in moment when i ordering new shafts and new points .

Bow spec. 60#@29" my draw lenght ,shelf cut -3/16
Rhino string ,12 strands

I want GT Velocity spin 300
Insert 100 grain
Point/ bh 125 grain
Considered 145 gr


I will cut arrow probably on 31'' or 30'' so i will have 510 --530 grain
Average 8.70 gpp

please for your recommendations ?
Field point 145 ?
Spin 340 ?
And questions is ,if i take 145 on front what happens with trajectory ? Dropping ?
My distance for shooting is 40 yards

[Friend]

Without knowing the actual velocity and several other factors, your drop will be in the neighborhood of 8.7 feet at 40 yards.

[wtpops]

It looks like your thinking about adding 20 grains. if this is correct there of course will be a little drop but you most likely wont be able to tell also what there is after shooting the new weight for a while your brain will make the adjustment and all will be well. Just my thoughts

[bowfanatik]

Someone with bow of 50 pounds and arrow 530 will have 10gpp and over. And that's perfect!  So i will bee fine with 60 pounds and same arrow with nice FOC.

[bowfanatik]

Double, sorry

[wtpops]

Originally posted by bowfanatik:
Someone with bow of 50 pounds and arrow 530 will have 10gpp and over. And that's perfect!  So i will bee fine with 60 pounds and same arrow with nice FOC.

Your right close to 9, as long as you don't go below the bowers recommendation for your bow you should be good.

[**DONOTDELETE**]

Originally posted by Friend:
Without knowing the actual velocity and several other factors, your drop will be in the neighborhood of 8.7 feet at 40 yards.

How did you come up with this calculation Friend?

[bowfanatik]

Originally posted by Kirkll:
 

Originally posted by Friend:
Without knowing the actual velocity and several other factors, your drop will be in the neighborhood of 8.7 feet at 40 yards.

How did you come up with this calculation Friend? [/b]

8.7 feet is joke for me  

[Friend]

KIRK....Calculated trajectory from Pete Ward's Ballistic calculator.

The 8.7 feet is the actual drop as if the arrow was shot directly straight off a cliff.

[**DONOTDELETE**]

Well.... i'm thinking you read something wrong bro.... I'm thinking you could throw a pretty good sized rock 40 yards without 8.7 feet of drop...  

[Sixby]

Perhaps a couple of feet.

God bless, Steve

[Jasper2]

Kirk, I think that calculation assumes the projectile is shot in a straight horizontal line parallel to the earth with no upward angle at all imparted ....which is unrealistic for our purposes but may explain the large number?  Actually, I'm not sure and it's too darn cold to go outside and test it    :D