I am currently shooting a Helim at 28 inch draw with 68 pounds, and a 27 inch arrow. I am shooting Easton Injexion Arrows in the 400 spine and am shooting 100g points. Should I be shooting the 330 in the Injexions? I also will be shooting a G5 prime Shift in 28 inch draw 68 lbs and 27 inch arrows as well and shooting Easton Fatboys. Should I be shooting the 400s in these arrows or the 340s. Currently I feel like I'm shooting well with the 400 Injexions but just feel like I may have made the wrong choice. I shot 257 in my 2nd 3d tourney today and other then bad ydage choices hit what I want to. Just wasn't sure if I was underspined and could tighten things down even more by changing.
Is the spine number the same as the arrow weight in grains? I'm new to archery/bowhunting. I shoot carbon express. 28in draw and 50-52lb weight. On the back of a box of Carbon Express arrows there is a chart that has all the calculations done. So for my bow they recommend 250 arrows. Is that the weight of the arrow in grains and also the "spine" your talking about?
No, that is not the weight. Not sure how carbon express come up with their sizing but it has nothing to do with spine either. Easton arrows are sized by their spine. An Easton fatboy.400 has a spine of .400. That is how much the arrow will flex between 28" centers with a 2# weight hung from the center of the shaft. Sent from my DROIDX using Tapatalk
A .400 should shoot fine with field points. You might experience some issues broadhead tuning. If you do, don't buy new arrows before you try backing off the poundage to 65# or so. On a target rig, you should be slightly weak with a .400 but most likely still be within normal target specs. But you are borderline weak Sent from my DROIDX using Tapatalk
This charts or one similar to it is on the back of my box of Carbon Express. Could you explain this to me please? Also you said your draw length is 28" at 68lbs. This chart also recommends the number 350.
The chart does not factor in draw length. They use arrow length. They do go together, however a long draw with a shorter than normal arrow will have more stored energy going into an arrow, requiring a slightly stiffer spine. His arrow length is 27" so a 250 is required but those number do not reflect spine. Sent from my DROIDX using Tapatalk
jerseyhunter95 I'm a user or cx arrows. The nr 250 or 350 only refers to the spine of the arrow, not the weight. For example the cx maxima hunter comes in a 250 which could weigh 8.0 grains per inch or the same arrow in a 350 would weigh 8.9 grains per inch. That is the arrow alone, not the nock or the broadhead . that's just the bare arrow shaft. So If your cx maxima hunter 250 arrow measures 28 inches (Bare arrow alone) it would weigh 224grains, then you add the weight of the Broadhead, Fletchings, Nock, insert, and collar and that should give you the total weight of your hunting arrow. If you want to get reat fussy, you could somehow weigh the glue used on the flethings and the insert, but most of us don't, that's getting a little fenatical. If you search enough you will find the CX arrows all have different grains per inch, which is a serious consideration when buying arrows. Hope this helps ya pal
If i remember correctly, a Carbon Express arrow labeled 250 equals a 400 spine and one labeled 350 equals 340 spine.
yea i figured that out it. theres another chart on the box that says the grains per inch on for 250 and 350. my arrows is about 28" inches long and i shoot cx heart attack which are 8.5 grains per inch so it comes out to 238 grains not including 100 grain tip, insert, fletching, and nock. probably about 340+ grains altogether. but thanks for replying. and is a rule of thumb that the faster the bow and more draw weight the heavier the arrows you shoot?
ok thanks i understand the difference now. but my DL is 28" and i tell them to cut my arrows to 28". thats what the pro shop told me and the guys there generally know what theyr doing. not that you dont or anytihng. im just curious why my DL and arrow length are the same. but i do have them cut from the seat of the nock to the end of the arrow. so my arrows are probably about 27 1/2"
Arrows are measured from the throat of the Nock. The recommended arrow length is 1" past your rest and generally speaking, this is a little shorter than your draw length. Sent from my DROIDX using Tapatalk
JerseyHunter95--You're a little off with the numbers you quoted, Here's the numbers I cam up with in case your interested. 28in cx arrow times 8.5 equals 238gr assuming your using 2in blazers, cx nock, cx insert, collar, plus 100gr BH you total would be 388gr. The Vanes, nock, insert, collar together weigh 50gr plus your Broad Head 100gr Hope this helps ya C YA
