Weighing pyrodex rs with scale

[nat5704]

Lost my powder measure and want to load a 80 grain charge of pyrodex rs but only have a powder scale is there a difference if so what would the weight be

 

[retrieverman]

If you want 80 grains and the scale says 80 grains, it should be 80 grains.

 

[deermanok]

Welcome from Oklahoma.
If you use the search feature, you should be able find information on weight vs. volume measures.

 

[HC]

His question was answered in his first post.

 

[BuckDoeHunter]

I posted a conversion factor of .7 but after surfing the net more, I see .7, .76, and .78 so I'm not sure.

 

[nat5704]

If you want 80 grains and the scale says 80 grains, it should be 80 grains.

So there is no difference in a powder measure saying 80 grains and my scale saying 80 grains

 

[BuckDoeHunter]

So there is no difference in a powder measure saying 80 grains and my scale saying 80 grains

Only with real black powder. With the black powder subs, you need to know the conversion factor, otherwise you could over charge your muzzleloader.

 

[bronko220002]

Do not go by the first responder nor the other gentleman that said the question was answered. Please refer to this chart.
http://www.curtrich.com/BPConversionSheet2005.htmThis is pretty much spot on. I just poured 80 gr by volume of RS and weighed it on my scale and got 54.5 gr by weight. If you were to weigh out 80 gr of RS you would be well over 100 gr by volume.

 

[nat5704]

Do not go by the first responder nor the other gentleman that said the question was answered. Please refer to this chart.
http://www.curtrich.com/BPConversionSheet2005.htmThis is pretty much spot on. I just poured 80 gr by volume of RS and weighed it on my scale and got 54.5 gr by weight. If you were to weigh out 80 gr of RS you would be well over 100 gr by volume.

Thank you

 

[HC]

I started weighing my charges in the last few months and found the weighed charges reduced my 100 yards group by about 1 to 1 1/2 inches. Weighed charges eliminated "vertical stringing" in the groups and reduced the number of flyers.

When I was playing around with my powder measure set on 100 grains volume and Pyrodex FFG, I found I could get a variance of as much as 13 grain weight, depending on how I filled the measure (tapping it, shaking it, holding it very steady, leveling it off, leaving it rounded, etc.)

Here's what I got with my adjustable brass powder measure set at 100 grains volume. Filled it with each type of powder, tapped the side of the measure with a pencil six times to settle the powder (it settled about 1/4"), then filled it again to overflowing, tapped it down again twice, then leveled it off and weighed it.

Goex FFG weighed 110 grains even.
Pyrodex RS weighed 78.0 grains.
Pyrodex Select RS weighed 76.7 grains.
Triple Seven FFG weighed 77.8 grains.
Triple Seven FFFG weighed 87.0 grains.

I'm at the point where I'll only shoot volume charges when I'm playing around. Serious target work and hunting - I use weighed charges.

This was the answer to the OP s question on his first post. The OP started a new thread on his second post.

 

[nat5704]

This was the answer to the OP s question on his first post. The OP started a new thread on his second post.

Thanks

 

[anonymouscowherd]

Empty 223 case holds 30gr, empty 308 case holds 54ish. 16gr equivalent volume should be 1cc (well, a little less than 16gr but we like easy math). So if you have a small graduated cylinder, 5cc would be 80gr equivalent volume of powder. Once you have that, measure and weigh a few times and see what it works out for you.

 

[UndeadPoet]

This may have already been stated, but 80gr by WEIGHT of Pyrodex is WAY MORE than 80gr by VOLUME. You should always measure Pyrodex by volume to get an equivalent charge.

 

[cook]

For what it’s worth: finally got a little Hornady scale. Roughly speaking, 100g by VOLUME = 80g by WEIGHT. It’s a lot easier, and more consistent, to go with weight. Muzzle velocity (245g bullet, 23 3/8” barrel, 80g by weight Blackhorn) is 1955 fps.

 

[Mcgiiver1]

If you want 80 grains and the scale says 80 grains, it should be 80 grains.

Absolutely wrong. The powder measure is labeled 80 grains, what that means is 80 grain equivalents of Black Powder. 80 grain eq. of Pyro RS measured by a powder measure will not weigh 80 grains on a scale.

So there is no difference in a powder measure saying 80 grains and my scale saying 80 grains

There is a major difference, don't do it with a scale.

 

[retrieverman]

Absolutely wrong. The powder measure is labeled 80 grains, what that means is 80 grain equivalents of Black Powder. 80 grain eq. of Pyro RS measured by a powder measure will not weigh 80 grains on a scale.

You completely misread what I posted. Nowhere in my post did I mention a “powder measure”. I said “SCALE”, and yes, if my electronic SCALE says 80 grain, it’s 80 grains.

Every single charge I put into my muzzleloaders is measured on a RCBS electronic scale.

 

[anonymouscowherd]

You completely misread what I posted. Nowhere in my post did I mention a “powder measure”. I said “SCALE”, and yes, if my electronic SCALE says 80 grain, it’s 80 grains.

Every single charge I put into my muzzleloaders is measured on a RCBS electronic scale.

The OP specifically asked if there is a difference between using a measure and a scale - AND GODS YES THERE IS!

Please please OP do NOT use 80gr by weight of pyrodex!!!

 

[Mcgiiver1]

Lost my powder measure and want to load a 80 grain charge of pyrodex rs but only have a powder scale is there a difference if so what would the weight be

The simple answer is to buy a new powder measure and keep your fingers and eyes intact.

 

[user 30396]

Lost my powder measure and want to load a 80 grain charge of pyrodex rs but only have a powder scale is there a difference if so what would the weight be

You might find this helpful. I use a 45-70 or a 458 Win. Mag. Case when measuring for my TC Gray Hawk .50 cal. sidelock measuring BP or Pyrodex and it works out very well. Cheap assessable powder measures.
Sorry I copied it as a vertical list but when pasted here it ran together. Still readable though just not as easy. But saves space.

Rifle Cartridge Case Capacities

Compiled By Chuck Hawks


The following capacities are based on the approximate weight of plain water measured in grains and were acquired from various sources. The brand of case measured is in parenthesis ( ) as follows: F C = Federal, Hor = Hornady, N = Norma, R-P = Remington, Wby = Weatherby, W-W = Winchester.

For a more comprehensive list covering additional cartridges see the Expanded Rifle Case Capacity List.

.223 Rem: 31.4 grains.22-250 Remington (W-W): 44.6 grains.223 WSSM (W-W): 55.0 grains.243 Winchester (W-W): 52.8 grains.243 WSSM (W-W): 53.0 grains6mm Remington (R-P): 54.6 grains.240 Weatherby (Wby.): 63.1 grains.25-06 Remington (W-W): 65.0 grains.257 Weatherby Mag. (Wby): 85.6 grains6.5x55 Swede (N): 55.0 grains.264 Winchester Magnum (R-P): 81.5 grains.270 Winchester (F C): 67.4 grains.270 WSM (W-W): 78.9 grains.270 Weatherby Mag. (Wby): 85.3 grains7mm-08 Remington (R-P): 52.2 grains7x57 Mauser (W-W): 55.6 grains.280 Remington (R-P): 68.6 grains7mm WSM (W-W): 83.0 grains7mm Remington Mag. (W-W): 83.2 grains7mm Weatherby Mag. (Wby): 87.5 grains.308 Winchester (W-W): 53.5 grains.30-06 Springfield (R-P): 68.0 grains.300 WSM (W-W): 79.0 grains.300 Winchester Mag. (W-W): 90.4 grains.300 Weatherby Mag. (Wby): 100.4 grains8x57JS Mauser (W-W): 62.7 grains.338 Winchester Mag. (W-W): 85.6 grains.340 Weatherby Mag. (Wby): 102.1 grains.35 Whelen (R-P): 72.6 grains.350 Remington Mag. (R-P): 73.7 grains.375 H&H Magnum (N): 96.4 grains.416 Rigby (F C): 132.6 grains.444 Marlin (R-P): 69.5 grains.45-70 Government (F C): 75.5 grains.458 Winchester Mag. (W-W): 93.3 grains.460 Weatherby Mag. (Wby): 144.7 grains

 

[Dieselden454]

If I may add my two cents . like Retrieverman said 80 gr on a SCALE is 80 gr ,but 80 grs in a MEASURE is VOLUME so 80grs of pyrodex RS in VOLUME is aprox. 56.2gr in WEIGHT on a SCALE !