|
|
07-12-2012, 09:18 PM
|
US Veteran
|
|
|
Join Date: Jan 2007
Location: Ohio
Posts: 4,452
Likes: 785
Liked 3,032 Times in 1,002 Posts
|
|
How much differance would you expect between scales?
I have a RCBS 510 that I've used for a LONG time. Last week the nylon set screw broke and RCBS send a replacement. Thank you RCBS. However in the mean time I borrowed a Dillon beam scale from a friend because I was working on loads.
When the replacement part arrived I decided to check the scales against each other and found a 0.2gn difference. Yes, I did use the same test weight when setting the scales up. The loads I was working on are 40 S&Ws consisting of 4.3 gns of W231. 180gn cast TC bullet, 1.125 OAL. Nothing pushing the envelope here. These loads are either 4.1/4.3 or 4.3/4.5 and I doubt I'll notice the difference at the range. Just thought it curious and wondered if anyone else checked their scales against each other.
|
07-12-2012, 09:50 PM
|
Member
|
|
|
Join Date: Feb 2010
Location: Florida
Posts: 1,338
Likes: 65
Liked 247 Times in 166 Posts
|
|
Got a couple tenths between mine also. Not surprised.
|
07-12-2012, 11:08 PM
|
|
Member
|
|
|
Join Date: Apr 2006
Posts: 17,759
Likes: 7,836
Liked 25,615 Times in 8,661 Posts
|
|
I truly doubt you will notice the difference of .2 grains in a 4.3 grain load ( less than 5%). I'm sure all scales vary somewhat.
|
07-13-2012, 05:43 AM
|
|
Member
|
|
|
Join Date: Aug 2010
Location: C-Bus
Posts: 6,335
Likes: 4,311
Liked 4,916 Times in 2,086 Posts
|
|
If you're using the same check weight that is part of most scale packs, it weighs 50 grams.
50 grams is 771.62 grains.
What you are reading (if a 50 gram weight is being used) is 771.62 grains +/- .2 grains or a 0.00052% difference.
I don't think the 50 gram check weights are indicative of anything. The accuracy we need and a good check weight size is in the range of 0 - 50 grains or roughly 3.24 grams.
* I have an old set of Ohaus but these are similar:
http://www.midwayusa.com/product/612...ight-check-set
Last edited by blujax01; 07-13-2012 at 05:46 AM.
|
The Following User Likes This Post:
|
|
07-13-2012, 06:23 AM
|
|
Member
|
|
|
Join Date: Aug 2005
Location: New Hampshire
Posts: 1,173
Likes: 212
Liked 838 Times in 262 Posts
|
|
I have a couple, they are both older scales with no plastic parts. One is an Ohaus 505 the other is a Redding, they read the same, spot on.
__________________
Geoff. Since 1960.
|
07-13-2012, 10:28 AM
|
|
Member
|
|
|
Join Date: Feb 2008
Location: Florida
Posts: 22,065
Likes: 10,777
Liked 15,466 Times in 6,788 Posts
|
|
Quote:
Originally Posted by blujax01
I don't think the 50 gram check weights are indicative of anything. The accuracy we need and a good check weight size is in the range of 0 - 50 grains or roughly 3.24 grams.
* I have an old set of Ohaus but these are similar:
Scale Weight Check Set
|
This ^^^^^^^. The set of actual check weights is the only way to weigh.
Zero you scale and then re check with a check weight close to your powder weight. I usually use the 5.0 gr. Readjust your scale to that weight.
__________________
Still Running Against the Wind
|
07-13-2012, 11:27 AM
|
|
Member
|
|
|
Join Date: May 2012
Location: S. Orygun
Posts: 2,461
Likes: 1,962
Liked 1,827 Times in 987 Posts
|
|
I have a Lee PPM, a Lyman/Ohaus D5, and an RCBS 5-10. I reciently purchased a Jennings Mack 20 Digital scale and all 4 measure within .1 grain. With the beam scales the difference in the hash marks and lining them up will cause nearly .1 variation in itself...
|
07-13-2012, 03:46 PM
|
US Veteran
|
|
|
Join Date: Jul 2009
Location: N.Az
Posts: 126
Likes: 0
Liked 0 Times in 0 Posts
|
|
That is about normal from what I've seen. I have check weights I can manipulate to check most loads. I use a balance beam and an electronic scale. I use them both to check that my powder drop is correct within those limits. The only other way is to trickle charge each round. I only do that for my 06.
__________________
AM-Tracks 66-69
|
07-13-2012, 03:50 PM
|
|
Member
|
|
|
Join Date: Aug 2010
Location: C-Bus
Posts: 6,335
Likes: 4,311
Liked 4,916 Times in 2,086 Posts
|
|
Quote:
Originally Posted by Rule3
This ^^^^^^^. The set of actual check weights is the only way to weigh.
|
Dude, no way?!
Way!
Dude, way?
WAY!!
Dude...
|
07-13-2012, 07:37 PM
|
|
Member
|
|
|
Join Date: Feb 2008
Location: Florida
Posts: 22,065
Likes: 10,777
Liked 15,466 Times in 6,788 Posts
|
|
Yes Way!
__________________
Still Running Against the Wind
|
|
Thread Tools |
|
Display Modes |
Linear Mode
|
Posting Rules
|
|
|
|
|