These blunt tips are made by starting with a regular 100 grain field tip. The first step is to trim approximately one quarter of the tip, I used a small Harborfreight cut off saw with an abrasive cutting wheel and I screwed the field tip into a junk arrow to help give more holding power.
The next step is to drill two 1/8 inch diameter holes in the trimmed field tip. Using the vise I first start the hole closest to the insert with a center drill and then finish with the 1/8th inch drill bit.
Then I rotate it 90 degrees to drill the next 1/8th inch hole. I use a drill bit to help me make sure that the second hole is going to be at a right angle to the first, and again start the hole with the center drill and then finish it with the 1/8th inch bit.
Adding the roll pins is next and I am using 1/8th inch diameter by 1 inch long pins. Here you tap them in until they are centered and you have an inexpensive blunt tip that is ready to go. In some of the photos I have the slots pointing towards the front. I decided later that having them towards the back would be better and just drifted them out and realigned them.
It makes for a very close fit with two pins in the end.
The finished product with the slots pointing towards the back.
They penetrate into pine about a quarter inch and do not become embedded, however they are tough on arrows when shooting at almost point blank range, although the pins bent back a bit, it still is quite shootable. The finished weight on these was right around 102 grains, so very little change in overall weight. I haven't had a chance to play around with seeing how well they fly at longer distances or with starting with a heavier field tip.
I think these will do great on small game, and look forward to giving them a try out this coming season.
-M
You guys constantly out do each other and we all benefit! Thanks!