ORIGINAL: CBM SC
MY QUESTION :
One thing I found very interesting was on a few shots ! On poorly released shots ...the Wasp heads seems to be the most forgiving , field points were slightly worse, but my Spitfires were the worst ...they shot great(cutting fletchings) as long as I made a good release........if not they seemed to hit 2-3 inches from my group !
I suspect this is a spine or FOC issue !! What do ya'll think ??
I think you are probably bordeline spine-as is for your set-up. Singles, even with good nock travel like the HP cams like a slightly stiff arrow. You have a long draw and are shooting pretty darn heavy poundage. Were it me I'd be shooting 300 class shafts
The answer to the Muzzy 130's is easy..BIG broadhead...combined with a probable spine issue
Same with the Spitfires...the 125s are long and I never could get them to group with my field points...they would group tight, but they change the FOC.
The Wasps are pretty easy to figure out too..that's a very small head and stiffened up the arrow a bit. Try shooting 100 grain field points out of your bow now, and see if you notice a difference in groups from the 125s...
By experimenting like that you can really find out the exact best spine to work with your setup..and it's much more telling than paper. This is one reason I like to tune my arrows or use various spined and adjust to what the bow wants, and not adjust the bow to what the arrows want (IMO, a band-aid)... with enough experimentation you will find that "perfect" spine that shoots fixed blade heads even at high speeds without having to change/fiddle with everything on the bow (C-shot, nocking point, poundage etc).