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Hit the mark...18.5% FOC

N

Newhunter1

Well-Known Member
SH Member
Joined
Dec 20, 2018
Messages
1,791
Well after tinkering with different field tips, vane configuration and different nocks I've finally feel that this set up is good to go. My old arrows was this.

Day Six arrows with 300 spine. Cut to 27"...makes this a really stiff arrow. 100 grain outserts from day six 4 vane configuration. This was only 16.5%. Arrow speed was 218 fps.

100 grain field tip
100 grain outsert
300 spine day six arrow at 27"
Day Six nocks 9 grains
4 fletch @ 6 grains per (24 grains)
Balance point of arrow was 18.5" for a FOC of 16.5%.

Changed the tip to 150 grains and changed the knock to G nocks 6 grains.

Balance point was now 18.625" for a FOC of 18.5% with Ashby's report of 19% FOC being ideal...I'm good. Here's whats funny...I increased the point weight by 50grains and decreased the nock weight by 3 grains. Arrow speed should be around 200-208 ish...nope. Right at 215 fps...and total arrow weight is 569-579 grains though 11 arrows.

Now I just need to sell 6 packs of Tooth of the arrow (only 3 broadheads were on my bolts) and 11 Iron will 100 grain broadheads (8 vented and 3 solid) so I can get some 150 grain heads for next year.

I'm going to keep the 4 fletch...I did tear off one fletch and actually got to 18.9% FOC, and am shooting bullet holes. I just feel better with 4 fletch and a large cut on contact Ironwill wide broadheads on the front of my arrows.
 
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Adding weight to the arrow affects the speed more if you start at a higher speed. Yours are fairly slow so it doesnt change much. My old light arrows were at about 290 fps,once i went to mid 500 grains it slowed down to about 250. Adding another 25 g slowed it too 247.
 
Bowmanmike said:
Adding weight to the arrow affects the speed more if you start at a higher speed. Yours are fairly slow so it doesnt change much. My old light arrows were at about 290 fps,once i went to mid 500 grains it slowed down to about 250. Adding another 25 g slowed it too 247.
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I've never been over 265 fps due to my short DL...last year my arrows were the GT Kinetic Pierce Platnums 400 spine. Total arrow weight was just 415 grains. I could have lowered the weight to 5 grains per pound, but I have made it a point to never shoot anything with an arrow less than 400 grains. Even if I had shot an arrow in the 310 grain range (62#) my speed wouldn't break the 290 fps mark. I don't chase the speed as I know I'll never get it, so that's why I am going to the high FOC. That I know is achievable and much better for my kills.
 
Newhunter1 said:
I've never been over 265 fps due to my short DL...last year my arrows were the GT Kinetic Pierce Platnums 400 spine. Total arrow weight was just 415 grains. I could have lowered the weight to 5 grains per pound, but I have made it a point to never shoot anything with an arrow less than 400 grains. Even if I had shot an arrow in the 310 grain range (62#) my speed wouldn't break the 290 fps mark. I don't chase the speed as I know I'll never get it, so that's why I am going to the high FOC. That I know is achievable and much better for my kills.
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THe shorter your arrows are, the easier it should be to increase your foc... according to a fairy
 
Newhunter1 said:
I've never been over 265 fps due to my short DL...last year my arrows were the GT Kinetic Pierce Platnums 400 spine. Total arrow weight was just 415 grains. I could have lowered the weight to 5 grains per pound, but I have made it a point to never shoot anything with an arrow less than 400 grains. Even if I had shot an arrow in the 310 grain range (62#) my speed wouldn't break the 290 fps mark. I don't chase the speed as I know I'll never get it, so that's why I am going to the high FOC. That I know is achievable and much better for my kills.
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Speed is over rated. I have a 30"DL so i start out faster than you. But in the end 20 or 50 fps make no difference at all. Some deer are super twitchy,others are not.
 
Bowmanmike said:
Speed is over rated. I have a 30"DL so i start out faster than you. But in the end 20 or 50 fps make no difference at all. Some deer are super twitchy,others are not.
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Yup...I know. I've killed deer with arrows ranging from 260 to 240 fps. Not going to worry about it...I just thought it was interesting.
 
Oh boy...just got my field tips tester kit...field tips that go up to 300 grains. Found that 175 grain tip will give me 19.9% FOC. Oh boy...I haven't sold off my broadheads as of yet. I love my Ironwills, but man they are expensive. I also love the tooth of the arrow...unfortunately ToTA does not have 150 grain, but they do have 175 grain. decisions/decisions.
 
Newhunter1 said:
Oh boy...just got my field tips tester kit...field tips that go up to 300 grains. Found that 175 grain tip will give me 19.9% FOC. Oh boy...I haven't sold off my broadheads as of yet. I love my Ironwills, but man they are expensive. I also love the tooth of the arrow...unfortunately ToTA does not have 150 grain, but they do have 175 grain. decisions/decisions.
Click to expand...
Don’t forget about the 200g tip!
 
Zero One Actual said:
Don’t forget about the 200g tip!
Click to expand...

put the 200 grain tip on this morning but did not shoot it.

So with a 175 grain tip, total arrow weight 594. Balance point is 18.875" which equals 19.9% FOC

So I put the 200 grain tip and the results are:
Total arrow weight 619 grains. Balance point is 19.25" and that equals to a 21.2% FOC. I'll shoot it this evening and sometime this weekend I'll head up to the bow shop to paper tune and shoot it 20 yards. I was told by the shop owner that a 200 grain tip might be to much for my spine arrow. Day 6 and 300 spine cut to 27".

If a 200 grain tip is to much...could I offset the tip by putting a lumenock on the end? Instead of 6 grains it would be 15.
 
Newhunter1 said:
put the 200 grain tip on this morning but did not shoot it.

So with a 175 grain tip, total arrow weight 594. Balance point is 18.875" which equals 19.9% FOC

So I put the 200 grain tip and the results are:
Total arrow weight 619 grains. Balance point is 19.25" and that equals to a 21.2% FOC. I'll shoot it this evening and sometime this weekend I'll head up to the bow shop to paper tune and shoot it 20 yards. I was told by the shop owner that a 200 grain tip might be to much for my spine arrow. Day 6 and 300 spine cut to 27".

If a 200 grain tip is to much...could I offset the tip by putting a lumenock on the end? Instead of 6 grains it would be 15.
Click to expand...
What poundage do you shoot? 27" DL,correct? I think the 300 spine should be fine with the 200 gr head unless you draw 70+#
 
Ever bow is different but I have 200 insert and 200 point on a 29" 300 spine arrow. 28 draw and roughly 50-55 draw weight...maybe that make u feel better? Shoot and see but I bet the it fly just fine. If they fly funny u can try turn poundage down....doesn't cost anything and that made tuning easier for me...
 
Bowmanmike said:
What poundage do you shoot? 27" DL,correct? I think the 300 spine should be fine with the 200 gr head unless you draw 70+#
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I'm at 26" and have been measured for that. I'm shooting 62#'s and have a Matthews Triax. I'll shoot it in my basement this afternoon and will have my wife on standby if it blows up and sends carbon splinters into my hand. Had an aluminum arrow blow up on me once...that's some scary poopoo.
 
Newhunter1 said:
I'm at 26" and have been measured for that. I'm shooting 62#'s and have a Matthews Triax. I'll shoot it in my basement this afternoon and will have my wife on standby if it blows up and sends carbon splinters into my hand. Had an aluminum arrow blow up on me once...that's some scary poopoo.
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Yeah,that is the biggest reason you dont want to be underspined. I shoot at 60# with 30" DL out of a halon x and use 300 spine black eagle with a 42gr insert and a 200 gr broadhead and arrows are flying great. They are 29" long.
 
Definitely lots of differences between spines. Just tested out the Apollo 200 and 250 spines with 100gr outsert in each. I had tips from 100 to 300 grains. 250 spine was ok with 100gr tip. 200 was great with 200gr tip. Lots of playing around with them before finally getting bullets at target.

Based on VXR 28, 70lbs, 30 draw length and bare shafts.
 
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