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Rifles, Reloading, Optics, Equipment
Reloading
Bumping Shoulders Issue
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<blockquote data-quote="statjunk" data-source="post: 372389" data-attributes="member: 18873"><p>Hello All,</p><p></p><p>On the advice of many here I decided to give bumping a try as opposed to simply neck sizing. To say that my first attempt did not go well is an understatement. I'm hoping that by describing what occurred that someone can offer me advice.</p><p></p><p>Here goes. I first took the fire formed brass and I measured it using the RCBS precision mic. The measures varied somewhat but I settled on .002 larger than Sammi. I chose to bump the shoulder .002 so that would essentially mean that I need to bump the shoulder into Saami spec. Zero on the gauge.</p><p></p><p>I then put the brass in the press and sent the ram to the top. Then I started to thread the FL sizer die down onto the cartridge until it stopped. At this point the die is sticking out of the press like 1/2 - 5/8". This is from a normal position where I would FL size when business as usual. I lowered the ram and dialed the die down a half turn. Lubed the case and sent it up into the die. It met very little resistance pulled it out and miced it. The measure didn't change. Turned the die down a little more, send in the brass, mic again. No change. Did this a couple more times. Nothing. Sent another fire formed brass into the die and it came out .004 under saami spec. Dialed the die out a bit and tried it again. Nothing. </p><p></p><p>I went through several pieces of brass trying this before giving up and deciding to write a post here. I had a buddy with me and he was as confused as I was.</p><p></p><p>Any ideas what I did wrong?</p><p></p><p>Back up inf0: remington brass, Lee dies, Lyman press</p><p></p><p>Thanks</p><p></p><p>Tom</p></blockquote><p></p>
[QUOTE="statjunk, post: 372389, member: 18873"] Hello All, On the advice of many here I decided to give bumping a try as opposed to simply neck sizing. To say that my first attempt did not go well is an understatement. I'm hoping that by describing what occurred that someone can offer me advice. Here goes. I first took the fire formed brass and I measured it using the RCBS precision mic. The measures varied somewhat but I settled on .002 larger than Sammi. I chose to bump the shoulder .002 so that would essentially mean that I need to bump the shoulder into Saami spec. Zero on the gauge. I then put the brass in the press and sent the ram to the top. Then I started to thread the FL sizer die down onto the cartridge until it stopped. At this point the die is sticking out of the press like 1/2 - 5/8". This is from a normal position where I would FL size when business as usual. I lowered the ram and dialed the die down a half turn. Lubed the case and sent it up into the die. It met very little resistance pulled it out and miced it. The measure didn't change. Turned the die down a little more, send in the brass, mic again. No change. Did this a couple more times. Nothing. Sent another fire formed brass into the die and it came out .004 under saami spec. Dialed the die out a bit and tried it again. Nothing. I went through several pieces of brass trying this before giving up and deciding to write a post here. I had a buddy with me and he was as confused as I was. Any ideas what I did wrong? Back up inf0: remington brass, Lee dies, Lyman press Thanks Tom [/QUOTE]
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Reloading
Bumping Shoulders Issue
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