Hunting Washington Forum

Big Game Hunting => Bow Hunting => Topic started by: Jingles on August 11, 2021, 09:48:50 AM

Title: Going back to school
Post by: Jingles on August 11, 2021, 09:48:50 AM: Yea strange topic but going back to school and remembering teachers saying there is no such thing as a dumb question, where I am trying to get everything as close to the same between 6 arrows and points/broadheads so as not to have an equipment excuse. Have even swapped broadhead blades between ferrules to get all weighing within .6 grains. At present heaviest is 129.9 gr and lightest is 129.3gr. These are supposedly 125 grain broadheads, am I correct in assuming that being they are heavier than advertised is a benefit as they will produce more KE on "impact" and as long as don't hit a major bone, i.e. shoulder, they should/could be a bone breaking impact and as long as they are shaving sharp likely to get a pass through out to 40 yards coming from a bow with 60lb draw weight and proper shot placement?
Title: Re: Going back to school
Post by: buckfvr on August 11, 2021, 11:31:16 AM: Even at 20 yards, @ 60lb, if you center punch a rib on the way in.....all bets are off. :twocents:
Title: Re: Going back to school
Post by: Special T on August 11, 2021, 12:24:27 PM: Episode 284
Great listen and some amazing science based information on arrow penetration. Many great tips that culminate in better penetration but one I have not done but will. Sharpen all blades and polish just like you would a straight razor. That one thing can be done by pretty much everyone. Fine grit sand paper the canvas strip wit paste then bare leather.

https://www.themeateater.com/listen/meateater?fbclid=IwAR0YGZ1X30jO8H6L92b6HAkcdaqNGzmRyoEBSkmMVXjrWV0MDABKR0n0G9c
Title: Re: Going back to school
Post by: dilleytech on August 11, 2021, 12:30:58 PM: You should focus more time on bare shaft tuning your bow for perfect arrow flight. Then none of the other stuff will matter. Being off a few grains won’t make a difference on impact points. Ribs are no match for a fixed head flying straight.
Title: Re: Going back to school
Post by: TooTallMike on August 11, 2021, 01:07:11 PM: What’s your total arrow weight and have you calculated your FOC?

That variation between your 6 arrows should not make much of a difference if any
Title: Re: Going back to school
Post by: mburrows on August 11, 2021, 01:49:46 PM: Agreed with what’s been said. You should be fine if your arrows are flying good and straight. Even a deer shoulder with a good fixed blade and a 425+ grain is going to be in trouble at 40 yards. Maybe not a pass through though.
Title: Re: Going back to school
Post by: buckfvr on August 11, 2021, 03:17:41 PM: Quote from: mburrows on August 11, 2021, 01:49:46 PM
Agreed with what’s been said. You should be fine if your arrows are flying good and straight. Even a deer shoulder with a good fixed blade and a 425+ grain is going to be in trouble at 40 yards. Maybe not a pass through though.

Ya, provided that deer is still there at 40 yards when a heavy slow arrow gets there. That would be a hard one to pull off on a wired mature whitetail.
Title: Re: Going back to school
Post by: Jingles on August 11, 2021, 03:46:07 PM: Ok will try to answer to the best of my ability and with what resources I have available.
Using my powder measure balance beam loaded arrow balances beam out at 445.8 grains
Loaded arrow levels out when pivot point? is 4 3/4 inches forward of center of arrow measured from end of shaft to nock groove, so no idea what percentage the FOC is.
Title: Re: Going back to school
Post by: mburrows on August 11, 2021, 04:04:08 PM: Quote from: buckfvr on August 11, 2021, 03:17:41 PM
Quote from: mburrows on August 11, 2021, 01:49:46 PM
Agreed with what’s been said. You should be fine if your arrows are flying good and straight. Even a deer shoulder with a good fixed blade and a 425+ grain is going to be in trouble at 40 yards. Maybe not a pass through though.

Ya, provided that deer is still there at 40 yards when a heavy slow arrow gets there. That would be a hard one to pull off on a wired mature whitetail.

I'd hardly call 425 grains a slow heavy arrow. Rough numbers but a 425 grain arrow out of modest IBO (320fps) 60lb bow pulled to 28" is still cooking about 260fps~, a 360 grain arrow is only going about 15fps~ faster.

I shoot 505 grain arrows and through the chronograph it reads 279fps. Id take the heavier arrow for wind reduction and penetration over a lighter arrow. To each their own.
Title: Re: Going back to school
Post by: TooTallMike on August 11, 2021, 04:30:00 PM: Quote from: Jingles on August 11, 2021, 03:46:07 PM
Ok will try to answer to the best of my ability and with what resources I have available.
Using my powder measure balance beam loaded arrow balances beam out at 445.8 grains
Loaded arrow levels out when pivot point? is 4 3/4 inches forward of center of arrow measured from end of shaft to nock groove, so no idea what percentage the FOC is.

What’s your total arrow length? From nock groove to end of insert

Sorry I should have asked that
Title: Re: Going back to school
Post by: TooTallMike on August 11, 2021, 04:32:32 PM: Quote from: buckfvr on August 11, 2021, 03:17:41 PM
Quote from: mburrows on August 11, 2021, 01:49:46 PM
Agreed with what’s been said. You should be fine if your arrows are flying good and straight. Even a deer shoulder with a good fixed blade and a 425+ grain is going to be in trouble at 40 yards. Maybe not a pass through though.

Ya, provided that deer is still there at 40 yards when a heavy slow arrow gets there. That would be a hard one to pull off on a wired mature whitetail.

425 gr total arrow weight is by no means a “heavy slow arrow” out of today’s compounds.

Personally running about 500gr total arrow weight and looking to up that to 600+gr

Look up the ashby foundation and the work they are doing. Lots of great info

They found lighter arrows shed speed way more than heavier arrows at distance.
Title: Re: Going back to school
Post by: Jingles on August 11, 2021, 04:43:07 PM: Quote from: TooTallMike on August 11, 2021, 04:30:00 PM
Quote from: Jingles on August 11, 2021, 03:46:07 PM
Ok will try to answer to the best of my ability and with what resources I have available.
Using my powder measure balance beam loaded arrow balances beam out at 445.8 grains
Loaded arrow levels out when pivot point? is 4 3/4 inches forward of center of arrow measured from end of shaft to nock groove, so no idea what percentage the FOC is.

What’s your total arrow length? From nock groove to end of insert

Sorry I should have asked that

Total front nock groove to insert is 28 3/4
Title: Re: Going back to school
Post by: Special T on August 11, 2021, 05:06:41 PM: The science in the podcast says a higher FOC is better. I really can't stress how a great discussion it is.
Title: Re: Going back to school
Post by: Jingles on August 11, 2021, 06:28:23 PM: Quote from: Special T on August 11, 2021, 05:06:41 PM
The science in the podcast says a higher FOC is better. I really can't stress how a great discussion it is.
Listened to part of it til it put me dozing
Title: Re: Going back to school
Post by: bracer40 on August 11, 2021, 07:47:08 PM: Quote from: Special T on August 11, 2021, 05:06:41 PM
The science in the podcast says a higher FOC is better. I really can't stress how a great discussion it is.
I wholeheartedly agree! Dr. Ashby conducted some incredibly detailed research on hundreds, maybe thousands (can’t remember exact numbers) of freshly killed buffalo in Australia. When you listen to it or read his info on his site, you’ll learn why this was important. Also performed numerous penetration experiments on multiple layers of Buffalo hides stacked together. All while declining all industry money.

He was seeking the ideal arrow and Broadhead weight and design.