Archery Talk Forum banner
Cancel
Create thread New Forums

Making arrows/bolts for bone breaking& deep penetration

Jump to Latest
1.6K views 15 replies 8 participants last post by  deimmortales  
D
#1 ·
Some test results

These are moderate to lightweight arrows fitted with right wing fletchings and right wing single bevel broadheads.

Out of a black 5 @ 68# 29.5 inch draw

470 grain, 4mm deep six fmj, 125 grain head. 330 spine

Point of failure was the 55grain outsert/ shaft connection. Did not pass through the
2x6 framing lumber. Did produce stress fractures in the direction perpendicular to the broadhead impact.

This was the shot close to the knot in the wood


Decided to try again with a less expensive shaft.

Used [full carbon] gold tip hunters [underspined at 500] same broadhead.

Penetrated the tip of the head ¼ past the 2x6. Same pattern of stress fracture perpendicularly to the impact of the head.
Arrow failure was the insert/ glue bond disconnected from the shaft. Repairable

This one not at 90 degrees to the grain structure.


Out of a Excalibur recurve crossbow 290lb draw.

Did [kind of] penetrate through the 2x6. Larger splits in the perpendicular pattern.
Point of failure was the broad head itself. It turned itself over inside the 2x6.

90 degrees to grain, with the large splits.



Image


Sent from my SM-J337VPP using Tapatalk
 
D
#5 ·
Half outs without footers? I dont yet know what you mean by footers.

The foc is 17.25.

I think for the kind of damage I want these to be able to do in a worst case scenario [hitting dead on the scapula] I will shy away from Fmj's due to the critical failure here. I know most people are not shooting framing lumber. But I think it shows how everything penetrates and holds up.

The heads are cheap single bevels from amazon, [12 heads for 22$ shipped]
Not what I would use in the field I was using them for proof of concept to see how The orthotic failure would develop.

If anyone has some actual bovine scapulas for some reason I'd love to break some arrows on them for testing lol

I ordered some grizzly stick broadheads a few weeks ago but covid has me backordered. IM also asking iron will if they will make me single bevel versions of their s225 I think that should be pretty devastating if I can get the shafts not to fail. That diablo bolt shaft took it like a champ tho.

For the black 5 I'm shooting 565 grain at 220-239 fps I ordered some 80lb limbs and 250 spine shafts. Hoping I can get up to 250ish fps.

Sent from my SM-J337VPP using Tapatalk
 
D
#6 ·
The only surviving shafts are crossbow bolts.

Grizzly sticks 200 grn overkill samurai came in. Took a beating like a champ, it's not bent at all. Pulled out the old broadheads. All save for one old broadhead tried to make a u turn.

The chineseium is strong with this one.

Still waiting on grizzlystick momentum 170 shafts, and 250 5mm fmj's

Anyshafts for bows that are strong as a crossbow bolt? I tried to get a spine rating/ info from ravin, they dont know.
Image


Sent from my SM-J337VPP using Tapatalk
 
#9 ·
Their centric outserts make the end of the arrow much stronger.
 
Save
Reply Quote Like Like
B
#11 ·
Most aluminum crossbow bolts are made with Easton 2219’s, those would be a good starting point. Also, if you have any FMJ DG 250’s, a 1/2” - 1” piece of 2117 glued or epoxied to the broadhead end will stop critical failures. If you send me the OD of the FMJ’s you have that exploded, I can do the math and tell you what aluminum shaft will make a proper footer. I use footers with the HIT system and I’ve had zero issues with the tips blowing up, even when I hit a concrete cinderblock square on.
 
D
#14 ·
The epoxy will take some time to cure so il post results tomorrow. 5mm fmj, 75 grain brass hit insert. 2 ½ inch aluminum footer 26grn, with the epoxy I mixed in some west system fiberglass powder so it's probably about 40grns total between the footer and epoxy.. my grn scale broke recently so I'm guestimating. The rubber orings will come off. It just keeps stuff from leaking down the shaft. The whole thing is probably just under 700grns at this point
Image


Sent from my SM-J337VPP using Tapatalk
 
D
#15 ·
5mm fmj with brass hit insert. 2.5 inch aluminum footer with west system resin epoxy mixed with fiberglass. Shaft held up on multiple hard hits. After 5 or so the tanto tip on the 200grn grizzly stick samurai finally tweaked a .008 off of true. I wouldn't consider this a critical failure on game.
Image
Image


Sent from my SM-J337VPP using Tapatalk
 
Archery Talk Forum
posts
39M
members
242K
Since
2001
A forum community dedicated to bow and crossbow owners and archery enthusiasts. Come join the discussion about optics, hunting, performance, troubleshooting, styles, reviews, accessories, classifieds, and more!
Full Forum Listing
Explore Our Forums
General Archery Discussion Bowhunting and Bowhunter Showcases Traditional Archery Crossbow Forum - General Crossbow Discussion F.I.T.A, N.A.A., Collegiate Archery, And J.O.A.D.