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Rifles, Reloading, Optics, Equipment
Reloading
338 Lapua, hard to chamber
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<blockquote data-quote="Broz" data-source="post: 679256" data-attributes="member: 7503"><p>Snapper26, As we talked before, the reason I suggested the posibility of an oversized chamber was this. I once picked up a couple once fired (Lapua) 338 LM cases used. When sizing these cases in my Redding body die they almost stuck. More lube was needed as they were tight above the rim about 3/8 to 1/2". Same as yours. Checking with the mic. proved these cases to be swelled about .005" in this area. Even after sizing a couple times and moving the shoulder back they would not chamber in my rifle. So sizing dies will not always size enough if the case is out too far. After working with these a while I tossed them away and wrote it off. I figured the rifle they had been fired in had a larger chamber than mine. I should also note that these cases didn't show much other sign of over pressure. Only the swell and a shadow of an ejector pin mark. This I have seen before and even with my rifle on a hot day. But the brass still sized perfectly and the brass is still in use. I have loaded extensively for the 338 LM with several powders and bullets. My current load is slightly above your accuracy load with H-1000 and also seated -.015" off the lands with a 300 Berger. Since you stated that you feel the resistance on close and lift of the bolt of a freshly sized case I feel it boils down to things. A chamber that s a little large or a die not sizing enough. I will be interested to see if the redding body die cures the problem. I do not feel you are over pressure, especially at the reduced test load of 88 gr.</p><p> </p><p>Make sure you lube the tight area of the case well with your new die. If it is indeed doing more work a little extra lube will be a good thing. </p><p> </p><p>Also, I set my Redding body die up to fully camover. Then I use the Reddig stepped shell holders to adjust the amount of shoulder bump. (.0015 ~.002")</p><p>This was recommended by Redding Tech and works great.</p><p> </p><p>Jeff</p></blockquote><p></p>
[QUOTE="Broz, post: 679256, member: 7503"] Snapper26, As we talked before, the reason I suggested the posibility of an oversized chamber was this. I once picked up a couple once fired (Lapua) 338 LM cases used. When sizing these cases in my Redding body die they almost stuck. More lube was needed as they were tight above the rim about 3/8 to 1/2". Same as yours. Checking with the mic. proved these cases to be swelled about .005" in this area. Even after sizing a couple times and moving the shoulder back they would not chamber in my rifle. So sizing dies will not always size enough if the case is out too far. After working with these a while I tossed them away and wrote it off. I figured the rifle they had been fired in had a larger chamber than mine. I should also note that these cases didn't show much other sign of over pressure. Only the swell and a shadow of an ejector pin mark. This I have seen before and even with my rifle on a hot day. But the brass still sized perfectly and the brass is still in use. I have loaded extensively for the 338 LM with several powders and bullets. My current load is slightly above your accuracy load with H-1000 and also seated -.015" off the lands with a 300 Berger. Since you stated that you feel the resistance on close and lift of the bolt of a freshly sized case I feel it boils down to things. A chamber that s a little large or a die not sizing enough. I will be interested to see if the redding body die cures the problem. I do not feel you are over pressure, especially at the reduced test load of 88 gr. Make sure you lube the tight area of the case well with your new die. If it is indeed doing more work a little extra lube will be a good thing. Also, I set my Redding body die up to fully camover. Then I use the Reddig stepped shell holders to adjust the amount of shoulder bump. (.0015 ~.002") This was recommended by Redding Tech and works great. Jeff [/QUOTE]
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Reloading
338 Lapua, hard to chamber
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