Weight variations on purchased points.

metsastaja · February 03, 2009, 05:16:00 PM

I just bought 2 packages of field tips labeled 125 grain. I got home and decide to weigh them. Not one was 125.. they ranged from 119 to 123.
I called the company and told them I thought they had a quality assurance problem.

What variation in weight would you find acceptable.

R H Clark · February 03, 2009, 05:45:00 PM

I've found that 3-5 grains is not uncommon.I doubt any any of us could tell the difference.

If we were shooting at 90 meters with sights,we would use points with much higher tollerences but we would also pay a lot more for them.

Bjorn · February 03, 2009, 05:46:00 PM

120-130 is perfectly fine for 125 heads.

Oliverstacy · February 03, 2009, 11:38:00 PM

I reload ammo and sort my long range stuff by the .1 grains...but I'm just that way.

It's amazing with rifle bullets if they say 150 grains they can be 149.9 to 150.1 and they all usually vary to that degree.

I have a problem...this I know.

so go figure.

Josh

JRY309 · February 04, 2009, 08:29:00 AM

I like the PDP points and have found the ones I've weighed were within 2 grs.

robtattoo · February 04, 2009, 08:35:00 AM

Question is though, if you didn't have an accurate grain scale & just put 'em on arrows & shot 'em, would you know the difference?

Nope.

metsastaja · February 04, 2009, 08:49:00 AM

No I could not tell the difference. Heck If I had purchased a package of 120g I would not even have made the post. I just thought it interesting that not one tip in the pack weighed 125.

Jeremy · February 04, 2009, 08:56:00 AM

A 5gr spread in a dozen points isn't too bad for what we pay for fieldpoints.

I do take issue when I get a pack of 160gr broadheads and they're all between 175 and 180gr though.

Blackstick · February 04, 2009, 08:59:00 AM

Recently, I weighed my Bear razorheads and couldn't believe the variation in them. Luckily I have enough to get a good close grouping.

mwmwmb · February 04, 2009, 09:23:00 AM

there are many variables a play here. 1 most of the time there are quality assurance measures giving +or- 5%. I dont know the QA at this company but there are also issues with scales. scales have an accuracy variance of XX denpending on the model and cost. I am not saying you have a cheap scale just that add +or-X% of QA and the variance from their scale and do the same again with yours and i bet they overlap.

metsastaja · February 04, 2009, 11:52:00 AM

When I called the company the person I spoke to was surprised. Her fear was they were being mispackaged in China. ie 120 heads going into a 125 package.

She thanked me for the call and said she would notify their QA department.

tradwannabe · February 04, 2009, 02:07:00 PM

the real question is, what is the difference AFTER you glue them on(assuming glue on). A dab of glue (hot melt) will bring you right on. It's what the final assembly is, that matters. Screw in's, put some glue on to the threads.
Rob

Jeff Sample · February 04, 2009, 05:04:00 PM

I've checked several brands of broadheads - 125 gr Woodsmans, 125 gr Magnus, 130 and 160 gr STOS. Guess what - none of them were spot on, though most were +/-5 gr of advertised weight. They are just not that much of a precision instrument, but I doubt very much that it has any notable affect on arrow flight. Hell, you're lucky if you can get premium wood arrow shafts +/-5 gr, and even if you do, that changes significantly between different shafts after dipping, cresting, etc.

Dave2old · February 04, 2009, 08:30:00 PM

Worst I've encoutered are Grizzly broadheads, as much as 20 grains variation in a six-pack of 160s. We all need to own electronic scales ... saw them as cheap as $20 at Kzoo.

Tommy Leach · February 04, 2009, 08:43:00 PM

I'm a little anal and understand. But the reality is 6 grains error on your point on a 550 gr arrow is only about 1.1% error. I'm shooting a selfbow and rivercane arrows, I can't tell if I have a problem.