Long Range Hunting Online Magazine !!! 300 WSM Lapua brass !!!
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# !!! 300 WSM Lapua brass !!!

#8
04-15-2004, 07:06 AM
 Bronze Member Join Date: Mar 2004 Location: pink hill, N.C. Posts: 76
Re: !!! 300 WSM Lapua brass !!!

JD,
To convert grams to grains; multiply gram reading by 15.43 to obtain grains.
To convert grains to grams; GNs X 0.0648 = GMs.
To keep myself from get too confused while using the gram scale that I had, once I settled on the powder charge that I was going to use (say 43.0 grains), I would do the math and right that gram number down and post it so I could see it (i.e., 43.0 gns X 0.0648 = 2.7864 grams). Helped me. Good luck and holler if ya need something. Johnny K.
#9
04-15-2004, 08:18 AM
 Silver Member Join Date: Aug 2003 Posts: 126
Re: !!! 300 WSM Lapua brass !!!

JD,
I use a gram scale to 4 decimals since I work in a lab. I weigh all my powder charges into vials at work, then just dump them in at home. If your scale is good to 4 decimals it will be enclosed to protect the readings from air current disturbances. With the door open the reading will wander say .0005 grams. This is OK since a piece of H1000 powder weighs about .0020 grams. I just put one vial on the scale and leave it zeroed. Then fill the vial, trickle up to the weight, dump it into other vials, and put the vial that is already zeroed back on the scale. I can do about 50 powder charges in 20 mins, accurate to one piece of powder. I resist chopping pieces since this increases the surface area, and the powder was designed to burn in the size they come in. Also chemical deterents are soaked into powder pieces to slow the burn at first when the surface area is largest and they gradually allow it to speed up as the surface area decreases during the burn. This allows the powder to burn progressively or at least not regressively. Cutting the pieces exposes the inner parts at the beginning. Of course I realize that you are only talking about cutting one piece. My friend did some tests where he observed higher pressures when he used a powder thrower that seemed to crush some of the pieces vs pouring them to the same weight.
#10
04-15-2004, 02:26 PM
 Bronze Member Join Date: Mar 2004 Location: pink hill, N.C. Posts: 76
Re: !!! 300 WSM Lapua brass !!!

Richard,
Yeah I thought about that but like you said, it's only one kernel of powder. I don't think it will matter with charges destined for medium capacity rounds that I load for.
Accurately measuring your powder to 4 decimal places definately takes one factor out of the error equation. Then you have to get Lapua brass, custom bullets, match primers, trued action, custom barrel and bedding. It's like one reader on here has as a quote "reloading is a means to an end, it's just there is no end" or something like that. Good luck. Johnny K.
#11
04-16-2004, 02:32 PM
 Silver Member Join Date: Aug 2003 Posts: 126
Re: !!! 300 WSM Lapua brass !!!

Johnny,
I'll tell you one thing. Measuring powder to one piece accuracy vs thrown from a measure cut the groups almost in half at 200yds. Let alone longer range. Thats just the one variable. Plus I can weigh them out pretty quickly like I said.
#12
04-20-2004, 06:00 PM
 Junior Member Join Date: Dec 2003 Posts: 27
Re: !!! 300 WSM Lapua brass !!!

Here's your EASY PEASY conversion... [img]images/icons/grin.gif[/img]

1 Grams equals 15.4324 Grains

1 Grains equals 0.0647989 Grams

Online Conversion Quick & Easy!

GOOD LUCK! [img]images/icons/wink.gif[/img]

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