Loading by percentage of case volume
- Thread starter outlawjw
- Start date
- Status
The Trail Boss "Dump, measure and Load" method is not really a refined most accurate loading for precision target shooting.
To be most accurate, one must measure the diameter of the internal holes of each Cheerio and separate them out to load all the same.
Besides you can not weigh them as they float away!
Your link did not work for me?
http://www.imrpowder.com/PDF/Trail-Boss-data.pdf
OP
OP
outlawjw
Member
Thank you , ants for the kind words. I like everybody else have bad days at the range ,where my eyes or something will give me fits. But I also have a few rifles that are not great shooters but there is something about them usually a sentimental reason that I keep & shoot them . Then there are the ones that I have labored over for hours & hours to get the rifle load ,&all other physical problems fixed to a point of .5 or better shooters when they come out to play .I've shot rifles since I was 4 , shooting turtles on the ponds around home. I've almost always had a back yard range of up to 400 yards I could & would practice on as often as money for fodder was available , I would shoot guns until accuracy dropped off & would then sell them and go through several new ones until I come up on another good one & off again.
Anyway the more I learn about what makes good accuracy the more I can teach my interested grandchildren.
Training them in all aspects of outdoor fun is what I live for & teaching them about the one who created it all & them. JESUS CHRIST our LORD.
Anyway the more I learn about what makes good accuracy the more I can teach my interested grandchildren.
Training them in all aspects of outdoor fun is what I live for & teaching them about the one who created it all & them. JESUS CHRIST our LORD.
I didn't want to point it out, but a stock rifle getting sub .5" groups is kinda hard to believe. Now I'm not calling outlaw out on his statement, it's just hard to believe a normal adult male (not a bench rest shooter, nor 10,000 yard sniper) is shooting .5" groups regularly. But as ants said, congratulations, your a better shot than I...
This is what many of us wish we had, this is what makes a shooter good.
buck460XVR
Member
- Joined
- Feb 6, 2007
- Messages
- 10,085
That is an exception to the rule. In general Sunray is right on this one.
Of course it is, still, "In general" does not mean.......not ever. "Not ever" is an absolute statement and as such, means no exceptions. If folks want to make absolute statements, they need to know what they are talking about or just say, "generally".
Just sayin'..............
buck460XVR
Member
- Joined
- Feb 6, 2007
- Messages
- 10,085
The Trail Boss "Dump, measure and Load" method is not really a refined most accurate loading for precision target shooting.
To be most accurate, one must measure the diameter of the internal holes of each Cheerio and separate them out to load all the same.
Besides you can not weigh them as they float away!
Your link did not work for me?
http://www.imrpowder.com/PDF/Trail-Boss-data.pdf
I myself have never found TB loads to be the most accurate, period. But they are easy shooting and easy to create due to the measure by case volume method. Most of the time I just marked a case where the bottom of the bullet would be when seated and then cut that case just below that mark giving me a handy measuring scoop. As for the link, I made the post in a hurry @ quarter to 5 this morning before I went to work. Don't know what happened there........Thanks tho, for giving folks a legitimate one.
Middletown
Member
Several years ago I did use a method like you describe to load a 45 ACP cartridge to only shoot in my Blackhawk 45 Convertible using AA#9 powder. Book loads max to min for both Ruger only 45 Colt and 44 Mag for AA#9 were very similar when compared to case volume. I have used this for other cartridges as well at times but it only provides a piece of the information and not the final guide for what I am testing at the time.
I put together an Excel spread sheet where you entered;
1. Length of the empty case.
2. Cartridge COL.
3. Bullet Length.
4. Bullet diameter.
5. Weight in water the test case would hold. (Water had a couple drops of dish washing soap in it)
6. Weight in grains of test powder the case would hold. (Level to top settled by tapping on table)
7. Desired powder charge in grains.
The spread sheet would then calculate the powder charge for 100% fill and also the volume fill % per #7 above. I could then play with the powder charge or COL. Here is a screen shot of the spreadsheet for Trailboss and 45 Colt as an example.
I put together an Excel spread sheet where you entered;
1. Length of the empty case.
2. Cartridge COL.
3. Bullet Length.
4. Bullet diameter.
5. Weight in water the test case would hold. (Water had a couple drops of dish washing soap in it)
6. Weight in grains of test powder the case would hold. (Level to top settled by tapping on table)
7. Desired powder charge in grains.
The spread sheet would then calculate the powder charge for 100% fill and also the volume fill % per #7 above. I could then play with the powder charge or COL. Here is a screen shot of the spreadsheet for Trailboss and 45 Colt as an example.
OP
OP
outlawjw
Member
It seems that I said that I went through a lot of guns to find the good ones ,although it is a lot easier to find one today than when I was younger. Before I got a piece of steel in my right eye I shot 3 d archery in the pro class & was lucky enough to make 7 the place in the world championship in 91. Shooting 1" to 3" groups at 100 yards with a bow is difficult compared to 1/2" with a rifle on a rest believe me . You are welcome to come to my house & check me out . You might even want to buy one of the 3/4 in rifles I will sell. Who knows . I would be a kind & good host although about 850 yards is about the most I can let you play on
OP
OP
outlawjw
Member
The test loads did not work out , but we're better than anything I've tried so far. Will think on my results & make up a batch of different weight brass all loaded identical as a standard for comparison purposes. Thanks for input , it was helpful & I'm not through with this project yet.
- Status
