I built the above talked about VAP’s two years ago and used Easton injexion Deep Six HIT inserts instead of the VAP outserts. The arrows are great but I wanted to have a little heavier arrow and really didn’t want to have to go to a big 125gr+ head since I already have a ton of 100gr heads.
I decided to go to ACE Hardware and look around for something heavy to put in the arrows to add weight. I though about building them with doubled up Easton inserts but that’s only 20gr and expensive. I ended up finding some 2” long 8-32 brass screws that fit the shaft with about .001 of clearance all the way around. These screws weighed about 70gr with the heads cut off. I ended up settling at 35gr worth which gave me 40gr by the time I epoxied them in, I used a dreamel tool and my powder scale to get them all exact.
I had to install the weight by removing the nock and putting them in from the rear, I needed something to shove them in so I went to the local hobby shop and found a 3’ stick of carbon tube that was .150”, this fit nicely inside of the rear of the shaft with very little clearance on the sides. The carbon shaft had a hole in the end I could stuff a Q-Tip. The reason this was important was to clean the insides of the shafts with isopropyl acohol so the epoxy sticks well.
After prepping the shafts I took the brass pieces and taped a 1/8”x 1” strip of masking tape around the very end like a seal. I made the seal so when I stood the arrow up on end with epoxy on it that the epoxy wouldn’t run into my insert. I then mixed up a two part medium cure epoxy and went to work. I rolled the brass in epoxy and inserted them in with the seal first in the nock end and pushed the brass all the way to the front with the carbon rod. I marked the rod so I knew they all went in the same distance. After each was inserted I made sure to clean the epoxy off after it was inserted and wipe the back of the arrow down so no residue was on the back. I also used an alcohol soaked Q-Tip to clean inside where the nock goes so there was no issues later.
After all the brass was epoxied in, I once again cleaned the entire length of the inside of the shaft with the soaked Q-Tip and rod to remove any epoxy residue. I then left the arrows standing on end overnight. Adding the weight took me from 405 to 445gr in each arrow and I ended up with 13.5% FOC with a 100gr point. I actually have large quickspins and quick fletched on the rear which are 35gr each, if i refletch with blazers I’d be over 15% with 100gr tips.
I’ve seen a ton of posts talking about not being able to build high FOC 4mm shafts and figures I’d share. This would work great on any of the Easton 4mm too, I could have used the entire screw and ended up with 90gr upfront, this would be even easier to do on a new build since you could just epoxy the brass in with your HITs.
I could use the .250 VAP arrows and add two pieces of brass behind the HIT and have a 22% FOC arrow at 485gr with a 100gr good flying head.
Hope this post is useful to someone.
View attachment 87955
View attachment 87956
View attachment 87957
View attachment 87958
View attachment 87959
View attachment 87960
View attachment 87961
View attachment 87962
View attachment 87963