I have looked at quite a few and agree, but Justin's fun experiment would mean more by aiming there. In Venatione Veritas
One of our guys shot the Low KE Killzones for a bit. Until he discovered Spitfires like the rest of us. Then his eyes were opened and he began living the life that most people only dream of. And if I'm aiming for the scapula, it's because I've got a gun in my hands.
wondering why I started taking flak this AM on this; I see why now- In the bolded above, I see how my wording could be misinterpreted. What my meaning was and I should have typed was "no, not SUGGESTING THAT at all" apologies for the confusion.
yes, and usually and a 300 is stiffer and heavier yet .... if on the cusp of two different spines, most likely the stiffer will be better in hunting situations and generally fixed heads will tune and fly better with the stiffer of the two ... I opt for the GT Velocity XT's as I can get a better FOC without getting to heavy, which I personally dont want, 420-450 grs are perfect for my uses and the speeds I want using the fixed heads I do ..
Thanks. The guy at Scheels said I was on the "edge" recommend the 340's. They seem to shoot well with Muzzy 100's. I desperately want to see these Nocturnalnocks dissapear into a ribcage Tik_tok. I'm getting mighty twitchy.
I'm around your draw length and have used 400 spine arrows in the past. They were fine as long as I didn't add extra weight to the insert. 125's got a bit sketchy trying to tune them to hit with field points. I bumped to 340's and added 20 grains to the insert, they tune right in with either 100's or 125 regular Muzzy's.
This is what I have been pondering. If I go to 340's I will likely have to go to 125 gr up front. My 400s are perfectly fine at my length and 100 gr up front.. beautiful bullet holes and perfect flight. Makes me truly wonder if I should even fool with anything. Unless I go upwards of 450 gr by my calculations I am not gaing much from where I am.
I actually like it. With 400's I had zero room to add weight or mess around with them. At 70 lbs they were probably still a bit under spined with only a standard insert, cut at 27", and only a 100 head. The 340's I have more room and they're still not finicky to get to tune. I added weight with the Goldtip "FACT system", so I can easily add or remove tip weight if I want to change them up for some reason. My 400 spine arrows come in at 378 grains with a standard insert and 100 tips. My 340's come in at 403 with 100 tips and 428 with 125's. Calculating kinetic energy between the two, or momentum, doesn't show a real huge "gain", but you can sure feel and hear the difference between the two if you shoot them back to back. If someone blind folded me and had me shoot while they picked which arrow to load, I could tell you which was which very easily.
I shoot 62#'s with a 340 spine Victory RIP TKO shaft. I also use the 60gr SS inserts. Its still plenty fast but gives great penetration. Of course I try to lay off the shoulder/leg area... we all should. But i've blown through scapula's with this setup and a Rage Trypan. Scapulas aren't a problem for 60-70lbs and 400 plus grain arrows. People thing that bone is dense and hard to blow through. Its simply not. Leg/elbow area poses more issues I think. I like the 450 grain arrow range for whitetails. Good speed, penetration and on my bow, at 62lbs... makes it even quieter. I used to be heavier weight and shooting 65 plus pounds. But with the efficiency of todays bows, for deer, its overkill. Smooth, quiet and a sweet to shoot for me...
I still smirk at some of this maybe "over spined" or "heavy" builds when I'm at 614 grains, barely pulling over 62lbs and a 28.5 inch draw LOL
so how would adding a 50 gr brass insert change my arrow spine. Axis 400 cut to 26.75' pulling 72 lbs at 26.5" DL or even better, go to 340 Axis with a 50 gr brass insert?
Adding insert weight would drive the FoC up as well as shaft deflection. That is a fairly short arrow length, but pretty heavy draw so I would venture on the 340 spine side, heck maybe even 300. I am only pulling 60# at 29.5" and am currently using 300 spine with 125 gr tips. But I also have some 340 spine that I plug 100gr tips in that fly really good too.
just adding 50 gr up front would be the easiest and cheapest way for me to beef up some with the current 400s but I would think it would make them tto weak. 340s may be just right for it.
if you're already at the max end of spine for your set up, you definitely don't want to add weight up front. It's kind of hard to overspine. Well, at least for those of us at 29+ DLs. You T-Rex Arm Club boys may find otherwise.
IMO people are much more afraid of being underspined than overspined, so they tend to err on the stiff side to be safe. I'm a 29" DL, shooting a 28.5" arrow at 65 lbs with a 90 grain Ethics Archery outsert and 100 grain head on a 340 spined arrow. I have zero tuning or flight issues with my setup, although most will tell you that you need a 300 spine for those specs.
