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Sogmanzulu
HB Full Member
| Joined: | 4 August 2008 |
| Location: | Medford, New York USA |
| Posts: | 28 |
| Photo: | [Download] | | Are you a handloader?: | Yes | | Favorite type of cartridge to load?: | rifle |
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Posted: 19 November 2008 02:19 AM |
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| I am fairly new to reloading (about 1 year) and I am having an issue with sizing a new cartridge. I am currently pressing for the .300 RUM, and am using all new components. The Max case length is supposed to be 3.600, but when I approach that length, the brass is being damaged (buckling) at the shoulder by the die. I am using the RCBS .300 Ultra die which is also brand new. Any help would be greatly appreciated.
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TCA4570
HB Full Member
| Joined: | 5 November 2008 |
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| Posts: | 15 |
| Photo: | | | Are you a handloader?: | Yes | | Favorite type of cartridge to load?: | I load everything! |
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Posted: 19 November 2008 09:24 PM |
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Max case length is 2.85, according to Hornady book.
Trim length is 2.84"
Your 3.600 dimension is C.O.L (cartridge overall length)
This may be only a guide, depending on gun.
Since you have all new components, and doing for the first time, might want to check to see if everything is right.
Something is not right, but may be lost in terminology.
Brothers buddy loads for that round, but don't know much about, other than it is loud!
It is a load that may cause a slump to some people.
The old grey mare, has younger offspring;)
No need to go, if know how to do with less.
Just my opinion.
TC
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72coupe
Handloading Master
| Joined: | 11 June 2006 |
| Location: | Iowa Park, Texas USA |
| Posts: | 1546 |
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Posted: 19 November 2008 10:48 PM |
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It sounds to me like you are crushing the shoulder while seating the bullet. If this is the case you need to adjust your seater die according to the instructions that came with the die.
The way I do it is to create a cartridge with the correct bullet and overall length. I do this by not screwing the seating die all the way in and with the seating stem screwed out very far. I then try to seat a bullet. I screw the seating stem in a little at a time until I get the length of cartridge that I want.
Then I screw the seating stem out again and turn the body of the seater die down until it contacts the mouth of the case. If you want a crimp you can turn it in further until the amount of crimp you want is achieved or if you don't want a crimp turn it out 1/2 turn and adjust your lock ring to save this setting. Now turn your seating stem down until it contacts your freshly seated bullet.
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Reloader since 1969.
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Sogmanzulu
HB Full Member
| Joined: | 4 August 2008 |
| Location: | Medford, New York USA |
| Posts: | 28 |
| Photo: | [Download] | | Are you a handloader?: | Yes | | Favorite type of cartridge to load?: | rifle |
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Posted: 19 November 2008 11:58 PM |
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| Thanks you very much, I am going to try this right now. I never adjusted the seating stem, but I think I can handle it. I appreciate your assistance.
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72coupe
Handloading Master
| Joined: | 11 June 2006 |
| Location: | Iowa Park, Texas USA |
| Posts: | 1546 |
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Posted: 20 November 2008 01:31 AM |
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| Good luck, have fun.
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Reloader since 1969.
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Sogmanzulu
HB Full Member
| Joined: | 4 August 2008 |
| Location: | Medford, New York USA |
| Posts: | 28 |
| Photo: | [Download] | | Are you a handloader?: | Yes | | Favorite type of cartridge to load?: | rifle |
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Posted: 20 November 2008 01:46 AM |
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The advice worked like a charm!! I never thought to adjust the seating stem, and now I know what to do in the future. Thank you very much, I guess thats why you are a reloading master. 
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wheezengeezer
addicted handloader
| Joined: | 16 July 2007 |
| Location: | Jeddediah Jones Swamp, Kansas USA |
| Posts: | 708 |
| Photo: | | | Are you a handloader?: | Yes | | Favorite type of cartridge to load?: | pistol |
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Posted: 20 November 2008 11:56 AM |
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| sounds like you missed something when reading the first few chapters of your load manual.they are very important!!
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I was raised in the 50's on gunpowder and jackrabbits.salt and pepper wooda made'em taste better
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