125's baby! Seriously though I love my G5 in 125 gr. Go Big or go home.

Which Parker do you have? I too shoot a parker are really like it a lot. When I purchased my first bow about 7 years ago, I made a quick decision. After shooting it a while, I felt like it didn't "fit" for me. Then I searched several bows and once I shot this Parker that I now have, it was like a nice fitting glove.

Because I can.[8D]

LOL!

That's what the forums are for, right?

The only difference I've found in 100's vs 125's is in tuning my bow. Really, at hunting-distances, 25 grains isn't going to make that much difference in speed or penetration. I shoot 100's on one bow, but my back-up bow shoots with the 125's a little more consistantly because I turned the poundage down a bit, and so the arrows I had were a tad over-spined. But I agree that if you want to shoot mechanicals, there's a little better selection in 100's.

David- i dont' really care about speed at all...i just wanted to know if the more active archers new anything about the differences of the two....thanks for your alls input..

atcfisherman- it is a parker hunter mag...i like it, but was difficult to get use to shooting fingers at 31 inch draw, but i really like it know and how light weight it is..

I shoot 125's because I HAVE all the speed I need....and I want as much "PUNCH" in my arrow as I can get. I like a HEAVY arrow (450g+) fro hunting (as a friend has recommended). I shoot 100g tips for targets. I've never done anything scientific to figure it out....but I use the same arrow for both heads with no tuning issues.

Well i use 100 becuase for my bow they fly smother. I used 125 and they flew different.

I've always used 125's. When I first started bowhunting, the field points that everyone was shooting were 125g, so it made sense to get the same weight BH. Now that I give some thought to it, I like the better FOC % that I get with the 125's, it gives my shorter length arrows a better spine match and a bit better penetration. The FP and BH still weigh the same and fly to the same point of impact, so I've seen no reason to change - except the 125's are hard to find around here.

Wrong.

Speed without weight is nothing. The only way to get more speed out of a particular bow, provided everything stays the same on that bow,is to use a lighter weight arrow and this equals LESS momentum and less penetration than the heavier but slower arrow.

The only 2 reasons to use one over the other is to get a properly spined and ballanced shaft. A shaft with a 400 spine may be just right with a 100 grain broadheadbut be too weak with a 125 grain broadhead and not give proper arrow flight in which case you would want to step up to a stiffer shaft...... say a 340 shaft.

A shaft with an overall heavier physical weight will require a heavier weight broadhead in order to give that shaft a proper FOC or ballance point.

Also, just because a particular shaft is heavier in physical weight does not necessarily mean that it is stiffer than a lighter weight shaft.

Heres the result in my testing of Muzzy broadheads:

Bow: Mathews Outback 70lb, 27" draw

Arrow Gold Tip hunters 55/75

broadheads 75,100,125 grain Muzzy 3 blade

75 grains at 25 yards Dead bullseye ... Penatration average 17"

100 grain at 25yards 2 1/2 " low .... Penetration average 22"

125 grain at 25 yards 5 1/4" lowPenetration average full arrow, some passed thru

target was a layered foam broadhead target I got at menards.

I always shot 125's, good penetration (all pass thrus) good blood trail.
this year I went to 75's to try and flatten out my trajectory. What was my 20 yard pin with the 125's now became my 1" low at 30 yard pin. But the first deer I shot was a yearling doe, maybe 85lbs field dressed. The shot was a double lung at 22 yards, the arrow was laying on the ground, it passed thru, but did not have enough energy to hit the ground. With my 125's I actually have shot thru a doe (120lb field dressed) passed thru and stuck about an inch into the tree that was behind her a few yards. Impressive. I switched to the 100's in order to try to get a little of both worlds, speed and kinetic energy.