I currently shoot a cheap model arrow produced by Easton that's about 340 grain and wanted to try out the heavier FMJ's. Would I have to readjust my sight or would it shoot the same just slower and more accurate. Thanks in advance Sent from my iPhone using Bowhunting.com Forums
You would have to readjust all your sight pins. If you shoot a single pin, you'd need new tape. Well worth it, in my opinion. I'd rather have a heavier, smaller diameter hunting arrow to increase penetration..
What arrows are you shooting now? I was unaware of "cheap model.....Easton". Are you sure they weight about 340 grains or are they 340 spine (says 340 on the shaft)?
Um.....if your arrows are in the 27-29 inch range....340 grains is up over 10gpi...possibly over 12gpi.....that is not a light arrow at all.
I have 2 sets of arrows 432 gr thats going 291 fps And 509 gr going 265 fps I do not have to readjust my sight for shooting within 25 yards. My hunting sets dont allow for shots past that so i didnt mess with sights at all
OP....just to go step further.... gpi stands for grains per inch....I re-read my post and realized you may not have known this. Also one of the most misunderstood things by those not familiarizing themselves with their equipment is the spine rating on the arrow is not the weight of the arrow....so a 340 spine vs a 300 spine doesn't necessarily mean the higher number is a heavier arrow. An entire arrow build includes all of the following for total weight in grains: -Arrow itself -Fletching -Nock -Inserts -Broadheads Some builds may also include: additional weighted inserts, arrow wraps... All those things add weight and effect the FOC (forward of center) in a total arrow build...which FOC is a crucial aspect when discussing penetration potential of a build.
Tynimiller is right my heavier arrows are a 300 spine and are 10.7 gpi And my lighter arrows are a 350 spine at 8.4 gpi
You will have more advantages with a heavy arrow than draw backs... -Quieter bow -Easier tuning (leading to better accuracy) -More kinetic energy -Sweet rainbow flight on the arrows -Your pin gaps will be further apart (with your light arrow they are probably really close to each other) Your draw backs: -You will need to adjust your sight -The aluminum on the fmj will tend to hold the shape when bent vs. carbon. (My favorite hunting set up from easton is an axis arrow with brass inserts to get the weight up around where the fmj is. Plus with this, you get a high FOC) -Slower FPS I tell people that are concerned with speed to shoot for something that gets you between 270-280 fps. This is a sweet spot for tuning I have found where you get the most speed with still ease of tuning. Shooting fixed heads past this point is a harder to broadhead tune. I guess to go any further, we would need to know draw length, weight, bow, and what you cut your arrows at.
I could be wrong on the weight because I did assume that the 340 on the shaft meant it was a 340 grain arrow. However it does say my GPI on the shaft and it's 9.5. The specific model by Easton that I'm shooting is called "zenith". I couldn't remember the name because I posted the question while at work, and I paid like $7 an arrow and compared to other brands such as carbon express I considered that pretty cheap, I apologize for the confusion. Sent from my iPhone using Bowhunting.com Forums
Spine has to do with stiffness if arrow If you want to know your current weight you could either weigh your arrows but as most of us dont have a scale in grains you can just add up your components This way youll know if the current weight of your arrow is what you want or not.
What's your complete setup? Bow, draw weight, length, etc. I went heavier this year as well. I'm shooting Gold Tip Kinetic Kaos 300's with an extra 20gr up front. I'm at 508gr shooting 285 Sent from my iPhone using Tapatalk
Complete setup is a Bear "Encounter" with a 65 pound draw weight, and a 29.5 draw length. The arrow I shoot at the moment is the Easton "Zenith" 340 with a 100 grain NAP killzone. Sent from my iPhone using Bowhunting.com Forums
Your arrow is about right if not a bit stiff. It is a good shaft and plenty heavy. You could add brass inserts or heavier points. If the shafts are flying good then stay with what you have.
The arrow you have (340 spine and 9.5 gpi.) if it is 28" carbon to carbon it should weigh around 410 grains with a 100 grain broadhead.
Went with a lighter arrow this year because I dropped an inch in draw length. 392 grs at 295 fps had a pass through on a 6x6 bull at 27 yds... There is a range for combinations of weight and speed that will give the same results.
I switched to FMJ’s 3 years ago & had to adjust my sites slightly. Sent from my iPhone using Tapatalk
