yeah you'll have no problem shootin through a deer, especially with a muzzy on the end of your arrow.

So your shooting a 300 - 310 grn arrow then correct? That's about what I come up with for weight at 280 fps and that KE. Just be sure that's not under what the bow is rated for. Your probably ok unless you shoot 70 lbs and 30 inches of draw. Your probably on the line though.

And are you saying you were shooting aluminums before, then switched to light carbons and you lost 10 ft/lbs of KE. You didn't change anything else in your set up? That's alot of KE to lose by changing arrows I think. Usually it's only a few ft/lbs because your speed varies in direct proportion to your weight and it sort of equals out in the end. Your momentum would go down, but I wouldn't think your ke would not go down that much.

I would also check to be sure your arrows are spined correctly for the bow you are using. Not that you can't get get carbons that light, but most of the popular brands are not that light unless you get the arrows for lighter set ups, like I shoot (low poundage, short draw). And you wouldn't be getting 280 fps if that were the case. Now if you bought some of the more expensive 3-D type arrows they are pretty light.

At any rate, that's plenty of ke to take deer with. Just make sure your arrows are the right spine, the bow is tuned well with broad heads, and you pick a good sharp head. And as always, concentrate on shot placement.

Good luck,
Paul

My arrow weight is 316 grains, I am trying those new satellite arrows...

My bow is approx set at 63 or 64 pounds..

I was shooting a 491 grain, 2315 with feathers and getting 240 ft/s with 63 ft/bs of KE..

I didnt switch anything with my setup except I dropped my weight down to the 63 to 64, it was around 66 with the SuperSlams..

Now when I put in the 316 grain arrow with my speed of 275 i get 53 ft/lbs of KE..

I did add an extra set of rubber whiskers too to help with the added noise..

I am shooting the carbons with feathers also.. They had Plastics, but the plastics made way too much NOISE.. almost sounded like they were roaring.. Kinda like if you let a piece of plastic out yoru window going 60 down the highway..

So... If I would have stayed with the exact setup i had with the aluminums, it dropped down to i believe 58-59 ftlbs...

For whitetail, no problem. Moose, Elk, probably not.

Have fun!

So you did change your set up some. You may have dropped more poundage than you think as well. Some scales are not that accurate, could have been off by a few pounds to beging with. That's also almost 200 grns in weight loss, that's pretty substantial.

What size arrows are you shooting and how long are they? And what is your draw length and model of bow you are shooting? 240 fps with a 500 grn arrow is fairly impressive to me. I would have suggested staying with that arrow, or maybe dropping to around the 400 grn mark. Not that what you have won't kill deer. The heavier arrow would just carry more energy farther because of the momentum is all, and it would be better on your bow in the long run. It's mostly a presonaly preference thing, they are both deadly if you put them in the right spot.

Paul

If your weigh is as you say... you're really shooting a light setup for hunting. The lighter arrows make the bow more noisy and everything. You're also working your bow at the bottom end of it's capabilities. All bows are more efficient when shot near the upper end of their range. Speed does not kill in this case. Placement, penetration and a sharp broadhead do. It'll work, but not to the optimum. I'm with whoever said you lost a lot by switching. I'd rather sneak up the poundage a tad and raise the arrow weight a little. Your old 500+ was an overkill, now you've gone to the other extreme which is REALLY hard on the equipment. It's just waiting to explode on you.

I'm shooting a Mathews Q2, 29" draw, I have a Muzzy Zero Effect, I shoot 27.5" arrows.

I have superslam 2315's and 2960 satellite's...

I guess I should have got the little heavier size carbon.. But I went by the chart and went with it..

Oh well.. Next time, I 'll know..

Hey that doesn't mean they won't work. I was just worried they might be underspined for your set up is all. They may be on the verge, but then they may be ok as well. If they shoot well for you I wouldn't be overly concerned about it. A little heavier arrow may be a bit quieter and possibly a bit better for your bow but those will kill deer just the same. If you are happy with them that's what counts.

If next time around you decide you want heavier arrows just try a different brand like carbon express or something. Look at something that has a bit weight for grns per inch. Or go to Bowjacksons site and check out his arrow weight calculators. The key will be how well they shoot with fixed heads on them.

Paul

Well thanks for the Info..

Actually, they fly Great with my muzzy's...

Shoot right with my field points..

Its kinda nice, I can shoot my 2315's and these Carbons the same at 20 yrds.. maybe an Inch or two difference

At 64# you are seriously worried about enough energy to kill a deer?

To be honest, if your broadheads aren't rusty, and are the slightest bit sharp, you'll kill the deer with 40# pull and the same setup.......REQUIRING that you can shoot.

Hit them in the front rib area at a decent range, and the last thing the deer is worried about is kenetic energy.