Broadhead Problem?

[lovestohunt]

I decided to try the NAP thunderhead broadhead in 100 grains. I shot my bow tonight with field points also at 100 grains. When I switched out the field points for one of my broadheads to see how the broadhead would fly, the arrow dropped almost 4" at 20 yards. I shoot a 29" draw at 67 pounds. Is it common for a fixed blade to drop that much? The bow is new this summer and was tuned at a pro-shop after about 50 shots. I haven't re-tuned it since. My mechanical blades seem to fly almost true to my field points. I called the pro-shop owner after I was done shooting tonight and he explained to me that fixed blades are very unpredictable depending on your set-up. He went on to say that guys practice with field points during the off season, re-sight in come hunting season with their choice of broadheads, then after hunting season is over, re-sight in again with field points (basically moving their pins to accomodate whatever tip they are using either broadhead or field point). Another person told me that fixed blades should fly just like field points and if they don't, then something is wrong with your tuning (usually nock is set too high) Who is right? It is hard to keep tuning my bow myself because there is a nocking loop on the string. The pro shop owner put the loop on so tight, I would have to cut it off to lower my nocking point then go back to the pro shop so he can tie on another loop. Any suggestions, opinions, etc. would be helpful.

[pre6422hornet]

go to eastonarchery.com and proceed to the download section. In there you will find a section for Tuning. I have used this for many years. It will give nice pictures and everything for fieldtip/broadhead grouping.

Good luck.

[lovestohunt]

Thanks buddy, worked like a charm!

[doryman]

So What Did You End Up Doing??
I Have Shot For Many Years Just Moving My Pin Block As You Were Talking About.
I Believe There Is A Tuning Problem, But Only A Couple Of Times Have I Got It To Where Ther Is Very Minimal Difference In Arrow Flight.

[lovestohunt]

What I did was take my nocking loop and twist it clockwise if you were holding your bow like you are going to draw it. The guy at the pro shop put my loop on so tight I didn't think it would move. Sure enough though, if you mark your loop in its current position and twist clockwise, your loop should start moving down the string. I think I read somewhere that you can get approx. 3 feet for every 1/8" you move your loop. Obviously there is a heck of a lot of variables there. My thunderhead 100 grain was shooting 4 inches low at 20 yards. I think I made 4 or 5 twists on my loop so the loop moved down the string. I just kept going back and forth from my field points to my broadheads until both shot on the same spot. I'll tell you what, after doing that, my groups on my field points tightened up so much, I had one broken nock and one Robin Hood. If you are on your mark horizontally, you shouldn't have to adjust your sights left and right. You might however have to play with your elevation on your pins. It was just a trial and error process until I got them both hitting the same mark. I didn't (actually couldn't) adjust my rest. It's a trap door and it doesn't have adjustments for elevation so the only thing I could adjust was my nocking loop. Hope that made sense. If not, repost and I will try to answer your question again.

[SUNNUTS]

Sould Like Things Worked Out For You, But I Have One Question. Did That Eastonarchery.com Have Tunning For All Bows. I Am Haveing The Same Problem

[lovestohunt]

Its more of a general tuning chart but the concept should be the same. If your nocking point is too high, the broadheads will be hitting low. Understand, my mechanicals were hitting the same as my field points no matter what I did. It was the fixed blades that I was having a problem dialing in. Like I said, it is a little trial and error. You don't have to move your nocking point alot to get big results.