anyone notice grain-weight differences?
07-31-2006, 08:44 PM
#1
Giant Nontypical
Thread Starter
Join Date: Feb 2003
Location: Jackson, Missouri
Posts: 7,051
anyone notice grain-weight differences?
I was at a Bass Pro Shops in Omaha, NE over the weekend and picked up one of those US Bowhunting digital scales for around $50 or so...
I'll probably be like the guy who shot his bow through a chrono for the first time; everything was always great until he actually knew what his bow was shooting!
So here's the reason for the post: I broke it open today, and laid six different brand-new three-blade, 100-grain Muzzys on it. Four of them were 97, one was 98 and the other was 95.
A group of NAP Spitfires (again, 100-grain) were all 96 grains. My 100-grain Rocket Aeroheads were 94, while a group of Cabela's Lazerstrike mechs were 98.
Anyone else notice differences like this -- and more importantly, fluctuations in the same head design?
My 100-grain field points were 94 grains, by the way.
Thoughts?
I'll probably be like the guy who shot his bow through a chrono for the first time; everything was always great until he actually knew what his bow was shooting!
So here's the reason for the post: I broke it open today, and laid six different brand-new three-blade, 100-grain Muzzys on it. Four of them were 97, one was 98 and the other was 95.
A group of NAP Spitfires (again, 100-grain) were all 96 grains. My 100-grain Rocket Aeroheads were 94, while a group of Cabela's Lazerstrike mechs were 98.
Anyone else notice differences like this -- and more importantly, fluctuations in the same head design?
My 100-grain field points were 94 grains, by the way.
Thoughts?
07-31-2006, 08:52 PM
#3
Giant Nontypical
Thread Starter
Join Date: Feb 2003
Location: Jackson, Missouri
Posts: 7,051
RE: anyone notice grain-weight differences?
I looked at that... There is a methodology for calibrating them, but I would think that's only if it got out of whack, so to speak.
Regardless, that wouldn't account for the differences. Let's say it was three grains off... then, ALL of them would be three grains off, but equal with all the rest.
Regardless, that wouldn't account for the differences. Let's say it was three grains off... then, ALL of them would be three grains off, but equal with all the rest.
07-31-2006, 09:23 PM
#7
Join Date: Jun 2006
Location: Northeast PA
Posts: 633
RE: anyone notice grain-weight differences?
Yep, they are "estimated" weights on most of them.
I had a pile of feild points get all mixed together so when I sorted them with my reloading scale they were all plus or minus a few grains from the "ideal". Some are worse than others, and some types (companies) are more consistant than others.
I had a pile of feild points get all mixed together so when I sorted them with my reloading scale they were all plus or minus a few grains from the "ideal". Some are worse than others, and some types (companies) are more consistant than others.
07-31-2006, 09:33 PM
#8
Giant Nontypical
Join Date: Dec 2004
Location: Ohio
Posts: 7,876
RE: anyone notice grain-weight differences?
Yep thunderheads vary between 5-8 grns. heavy. Fp's are usually right on and muzzy's are 3-4 heavy. Nap said it was because the parts to make one come from different places. They sent me a hat
If they are estimated weights I think that should be posted on the package. I've never seen an admision of it.
If they are estimated weights I think that should be posted on the package. I've never seen an admision of it.
07-31-2006, 09:53 PM
#9
Giant Nontypical
Thread Starter
Join Date: Feb 2003
Location: Jackson, Missouri
Posts: 7,051
RE: anyone notice grain-weight differences?
Well, it's already proving itself useful then...
If things vary a bit, I can now sort through them to find the most consistent and -- in the case of field points and broadheads -- items that match up the most closely.
If things vary a bit, I can now sort through them to find the most consistent and -- in the case of field points and broadheads -- items that match up the most closely.
08-01-2006, 07:20 AM
#10
Nontypical Buck
Join Date: May 2004
Location: Albany, NY
Posts: 4,679
RE: anyone notice grain-weight differences?
I have the same scale and we have a expensive reloading one at the shop and the cheap one weighs in the same every time as the expensive RCBS at the shop. I have also noticed differences like this with some heads. Slick Tricks all seemed to be dead nuts on though. PDP brand field and glue in points all seem dead on too which is why I shoot these and the gold tip glue ins when I can. I haven't weighed my rage slip cams yet but plan to soon.
Sometimes the different weight heads could be useful though especially when using a lower grade arrow shaft that has 2-3 grain tolerance differences. Pair up the right head w/ the right shaft and then you have all arrows within 1 grain of eachother.
Edit - If you want to test accuracy of your scale a nickel almost always weighs exactly 5 grams. Make sure to switch it to grams though.....
Sometimes the different weight heads could be useful though especially when using a lower grade arrow shaft that has 2-3 grain tolerance differences. Pair up the right head w/ the right shaft and then you have all arrows within 1 grain of eachother.
Edit - If you want to test accuracy of your scale a nickel almost always weighs exactly 5 grams. Make sure to switch it to grams though.....