When is FAST FAST and HEAVY HEAVY?

[interceptor]

I put my gear through a chonograph today, just for a look see.

Mathews Ultra 2 at 70lb, I am unsure of the actual peak weight as I don't have access to bow scales at the moment.

My standard arrows are Epic 300's and weigh 405 Grains including 100 grain f/point. I made up a heavy arrow by inserting 6mm mower pull cord into the shaft this lifted the weight to 676 grains. I use Woody's Outbacks so in hunting trim I am 25 grains heavier then this.

Standard shaft gave me 291 f/s and the heavy was good for 230 f/s.
I plan to make up more of the heavies as the buff are getting think around here and it will only be a matter of time before I get onto one.

I just wondered if this is around normal for modern aggressive compounds, and if the heavier shaft would do the job on a good size buff at this speed.

Is this fast and heavy?

Just curious Noel

[ds]

Great to see you opting for a heavier shaft. As long as you are happy with the accuracy of the said shafts, I reckon theres a cranky old bull out their with your name on it.
I have not used a cronograph in some time so can't comment. I personally would not be to concerned about the speed, I assume you have your bow wound up. If you keep your distances short any negatives due to poor trajectory will be negligible, plus it heaps more fun that way. :P
Good luck mate.

ds

[takleberry]

the speed on the heavy sounds good I was getting 240 out of a 640gr arrow at 70 # and as DS said get closer

Tac

[pete w]

a 300 spine is very heavy spine for that bow.I would boost up the point weight to try to weaken the spine .Also you will get more weight too.
A 340 spine with a heavy broadhead may be better suited .

[hunting_mainiac]

if you are going to go for a big buff i would say get up close and stick with the heavy ARROWS , but for pigs i would just be using around 450grain markbecause then you still have great speed .
inter- saw willow and grub today , said the bowclub out there is coming along nicely. good job

linkin

[interceptor]

Thanks for the feed back Lads,

Hey Tac,

I have a pile of gear coming for the Grizzly this week, I will send you some pics when I am done.

DS,

Thanks for the link on your footage, it is TOP SHELF. Have you done anymore on your full length vid yet? it still gets me going everytime I watch it.

Pete,

I use 125 grain Outbacks, I went to the heavier spine because the 65/80's I was using could not take the weight of the b/head, they dropped and flew like a bugger. These fly pretty good, mind you I haven't bothered with paper tuning or anything like that but they seem to group OK. With the f/points I put 4 arrows into a 3" group at 45 paces last week end thats pretty good for me considering how much I have not shot in the last 2 1/2 years.

HM,

I will be sticking with this gear as it is, nice and fast for the hogs and slow and heavy for the buff.

Going for a walk on Sunday, hope to come accross a hog or two and maybe get a pic or 3 of some buff, I will let you know how I go.

Are you shooting the NT titles this w/e HM? If so good luck.

Cheers Noel

[Wareagle]

If you have access to a chronograph, I'd be more interested in working out the kinetic energy of both arrows. speed x speed x grains divided by 450,240

[interceptor]

Wareagle,

Is that:

291fs x 291fs x 405gr / 450 = 76212.9?
230fs x 230fs x 676gr / 450 = 79467.556?

If so what do these answers mean?

Noel

[interceptor]

I just checked out a couple of KE calculators on the web, very interesting.

My arrows spec out thus:

405gr at 291fs = 76.17
676gr at 230fs = 79.43

From the small amount of info I read I got the impression that there is not much to be had with the heavier arrow only 3 and a bit f/lb (is f/lb correct?) as 75 plus is already up there as far KE goes, I may be wrong.

I figure Glenn would know heaps about this, so I await your feedback Lads.

Cheers Noel

[Wareagle]

The lighter arrow will fly flatter and should be more accurate without all the inserts.3f/lb ke. difference I don't think you will notice any difference in penetration at hunting distances.

[hunting_mainiac]

yea mate , i am trying LOL (last night i hurt my knee playing rugby , today its swolen as hell) . And because of this i cant run , only walk slow down the range


Are you shooting the NT titles this w/e HM? If so good luck.

[takleberry]

intercepter,

stay with the heavy arrows mate, heres a link to explan

http://homepage.ntlworld.com/joetapley/target.htm

I'll send you a XL sheet as well on KE/SLUG

had guys from vic up here with fast light arrows all the theory when out the window on a heavy built NT boar I recommend nothing less then 550gr

Tac

[Wareagle]

If my memory serves me well, I read a few years ago, you only need 80lb KE to legally shoot an elephants in Africa. :wink:

[hellier]

OK you are in a ring boxing with a teenager and his fist hits you at 100 kph...then Mike Tyson hits you with his fist :shock: at 100 kph...kinetic energy and momentum... :o

[morton]

and that means,.. what ?:shock:

[pdrwired]

it is far more important to hit in the vitals than to hit with a heavy arrow.

[morton]

it is quite surly the truth ..no myth..heavier arrows are more forgiving to shoot than lighter ones.

[pete w]

www.bowjackson.com has a calculator that will show KE and MOM as well as trajectory .
The heavy arrow will have a lot more MOM.

[interceptor]

I was with a mate a while ago when he shot his first Buff (with his new 375 H&H rifle) it was a big beasty and went 110DP.

I fired an arrow (my standard hunting shaft @ 420 odd grains) from about 20 metres into the vitals and the arrow buried up to the nock?

The beast had already expired abviously but I have no doubt that he would have died quite convincingly from the one arrow in very short order.

I hope to prove this theory before the wet starts in the next month or so.

I will keep you posted on the outcomes.

Cheers Noel