I've been shooting several times a week and really like the bow. Dead in the hand, quiet and fairly quick. Was off today and decided to see how my boradheads fly. Slick Trick Standards, 100 grain. They were hitting right and somewhat low at 20 yards. Plus arrow flight was not what I would call good. So, I went and got two bare shafts and shot. Holy crap!!!! The bare shafts are hitting 4-5" to the right. Arrow flight was terrible. I looked like the nock end was spiraling in. I dropped the draw weight one full turn and same thing, except the arrows hit lower. Several times it looked like the arrow was going to hit sideways.
When I bought the bow,I asked the tech if the 400's were spined adequately. He assured me they would be fine. I 'm guessing they are underspined. Looking at Eastons new chart it;s calling for a 340. I know a few years ago when I checked 400's were ok for my Mathews LX with the same specs. Noticed a few other issues like my peep keeps moving and when I left the pro shop I was at level knock, now it's very nock high when the rest is in position.
Eventually I think youll have to twist the left yolk and take a couple out of the right.
You didn't mention what rest you're using. The Whisker Biscuit is probably the most popular rest in use, and I love mine and have used them for many years, but one thing about them you might want to keep in mind is that any of the 'full capture' rests tend to be difficult to tune using the bare shaft technique. I used that as my primary tuning method for years before switching to the WB, and fought the tuning issues for a good while afterwards. Tuning the arrow flight is still the same process and tuning for BH and FP impact to be same is still the way to go, but the results of bare shaft tuning can be misleading with full capture rests. I found that I was much better served by eliminating that tuning method and proceeding directly from getting a good visual flight, especially with a lighted nock which really shows any porposing or tail-wagging, to bringing the BH impact point in agreement with the FP one. When you've achieved that at forty yards, you're good to go, tuning-wise. The bare shafts may or may not agree, but the result you're really after will be there.
I'm not sure of the reason for it, but I suspect it is some very slight torquing of the bow that is magnified by the rest imparting that influence more to the arrow because of the fact that it is in contact much longer.
If you use a D-loop, that could also slipping up the string and changing the nocking point.
It does sound like you may be underspined, but the string issue needs to be taken care of before any other decisions are made. I got by shooting 400's through my LX at nearly that poundage and got good groups, but I always liked arrows on the stiff side of those recommended in the charts, and was happier with my consistency with 340's.
Thanks for the input. Definitely plan on getting the string issue resolved prior to doing anything. Really surprised that I would get that much stretch after two months of less than average shooting. Especially on an $1100 bow. I had the strings replaced on my LX two years ago, they haven't budged.
Russ, I'm currently shooting a QAD rest. Never saw such poor bare shaft flight in my life. I don't "think" torque is the issue. Bow has nice thin grip that just lays perfectly in sweet spot in my hand.
Just cheap plug for LAS. When I bought the bow in April it was set up with an Axcel ArmourTech HD 4 pin sight. I just didn't like it from the start. Sight ring was not bright, nor were the pins. And I hated the single line on the level. I like two lines to center the bubble. Sight was built like a tank and adjustability was great, I just didn't like it. He asked which one I did like. I had wanted to get the MBG Widowmaker and stated such. Took my bow and switched them out. Got he 20 yard pin dialed in. I was feeling pretty happy by now. Bow is shooting great, lovin' the new sight. I go to leave and he tells me they owe me the difference in price on the sights. Certainly didn't expect that. I expected to eat the difference which was $45. Nope. They credited back to me. LAS's customer service is second to none.
Suggest buying a bow press and learning to do your own work.
I did that a few years ago and very glad I did.