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Rifles, Reloading, Optics, Equipment
Reloading
Stuck case in chamber
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<blockquote data-quote="Blackhawk" data-source="post: 1943724" data-attributes="member: 105459"><p><em><span style="color: #b8312f">Accordingly IMR Powder 4831 at 70.2 grains is a compressed powder load. and is what the manufacturer themselves (Hodgdon Powder Company ) state as maximum recommended safe powder charge and you at 70.0 grains are very close to maximum..</span></em></p><p><em><span style="color: #b8312f">I realize that this figure is a suggested one and people routinely add more powder for various reasons chief among them is an increase in<strong> velocity</strong>. </span></em></p><p><em><span style="color: #b8312f">However chasing this rainbow comes at a price. and that is increased <strong>Pressure</strong></span></em></p><p><em><span style="color: #b8312f">Moving Forward:</span></em></p><p><em>Deprime and using your choice of media either vibrate or wet tumble your brass.</em></p><p><em>After cleaning and drying examine all your brass discarding any that exhibit signs of dents, cracks , dings or swelling.</em></p><p><em>Visually check the case head for obvious signs of over pressure , such as a flattening of the letters, or bolt face indentations, blown primer pockets etc.</em></p><p><em></em></p><p><em>After Fl resizing allowing for say -.002" shoulder bump and trimming your cases to length ( all the usual stuff ) I would start with a reduction powder by - 2 1/2 % which would equate to 68.4 grains .</em></p><p><em>Additionally I would back off -.020" on your bullet seating depth. ( I agree with the other posts on this )</em></p><p><em>Starting with a thoroughly cleaned rifle you must begin again.</em></p><p><em></em></p><p><em><span style="color: rgb(65, 168, 95)"><strong>Now that you are back in let's say a safety zone </strong></span>, I would begin your load development development anew .</em></p><p><em>Using your chronograph and the Satterlee Test start load development over watching for the spikes and finally a null.</em></p><p><em>All the while watching for your lowest SD & ES numbers.</em></p><p><em>keep working in one direction at a time and while leaving your bullet -.020" off the lands adjust your powder amount in + 2 tenth increments until you find that null.</em></p><p><em>After you find your best ES & SD chronograph numbers proceed to fine tune your load by finding the correct bullet seating depth. Again move in lets say .005" adjustment until you are close to your satisfaction level.</em></p><p><em>Next a trip to your range is in order so that you can fine tune your seating depth further until you have achieved your optimum load development, all the while making certain that your cases will feed as well as extract easily from your rifle' s chamber.</em></p><p><em>A little more work will be required on your end.</em></p><p><em>Another thought if you are using SAMMI Spec O.A..L. Cartridge Case Gage and your cartridge case will not bottom out but instead will stop about 2/3rds of the way down you may need to adjust your FL resizing die to allow more cam over on your press.<strong>. Failing to follow this additional step can result in a hard bolt closing or a difficult extraction issue.</strong></em></p><p><em>Simply by loosening the dies lock ring and screwing the die body down a bout an 1/8th. of a turn at a time or less until your brass cases will bottom out in the case OAL gage ( this I'm certain that you know )</em></p><p><em></em></p><p><em>With my .300 Win Mag on my second rifle because of chamber lengths being slightly different between the two rifles , I had to allow for more press cam over in order to allow the case to smoothly fit inside my case gage.</em></p><p><em>Imperative for a reliable feeding cartridge, and I am using bolt action rifles. </em></p><p> <em>I'm not referring to C.O.A.L. here as the bullet seating depth (jump factor ) varies with each of my bolt action rifles.</em></p><p><em>Additionally after about 3 - 4 firings I myself have experienced this as the brass hull has conformed to the chamber wall dimensions and must be brought back to SAMMI Spec ,especially if you want a dependable, feedable , and totally reliable round that you plan to use in the harvesting of game.</em></p><p><em>Notes:</em></p><p><em>By changing items such as a rifle barrel even with the use of a chamber go / no gage set you have altered your rifles internal dimensions slightly. ( I'll not go into stacked tolerance issiues here ) suffice to say you will need to go back to the drawing board with your load development.</em></p><p><em>Again Note:</em></p><p><em>Please , I'm not trying to tell you what to do or how to do it.</em></p><p><em>I'm stating that this is how I would approach this small dilemma in hopes of coming to a successful conclusion.</em></p></blockquote><p></p>
[QUOTE="Blackhawk, post: 1943724, member: 105459"] [I][COLOR=#b8312f]Accordingly IMR Powder 4831 at 70.2 grains is a compressed powder load. and is what the manufacturer themselves (Hodgdon Powder Company ) state as maximum recommended safe powder charge and you at 70.0 grains are very close to maximum.. I realize that this figure is a suggested one and people routinely add more powder for various reasons chief among them is an increase in[B] velocity[/B]. However chasing this rainbow comes at a price. and that is increased [B]Pressure[/B] Moving Forward:[/COLOR] Deprime and using your choice of media either vibrate or wet tumble your brass. After cleaning and drying examine all your brass discarding any that exhibit signs of dents, cracks , dings or swelling. Visually check the case head for obvious signs of over pressure , such as a flattening of the letters, or bolt face indentations, blown primer pockets etc. After Fl resizing allowing for say -.002" shoulder bump and trimming your cases to length ( all the usual stuff ) I would start with a reduction powder by - 2 1/2 % which would equate to 68.4 grains . Additionally I would back off -.020" on your bullet seating depth. ( I agree with the other posts on this ) Starting with a thoroughly cleaned rifle you must begin again. [COLOR=rgb(65, 168, 95)][B]Now that you are back in let's say a safety zone [/B][/COLOR], I would begin your load development development anew . Using your chronograph and the Satterlee Test start load development over watching for the spikes and finally a null. All the while watching for your lowest SD & ES numbers. keep working in one direction at a time and while leaving your bullet -.020" off the lands adjust your powder amount in + 2 tenth increments until you find that null. After you find your best ES & SD chronograph numbers proceed to fine tune your load by finding the correct bullet seating depth. Again move in lets say .005" adjustment until you are close to your satisfaction level. Next a trip to your range is in order so that you can fine tune your seating depth further until you have achieved your optimum load development, all the while making certain that your cases will feed as well as extract easily from your rifle' s chamber. A little more work will be required on your end. Another thought if you are using SAMMI Spec O.A..L. Cartridge Case Gage and your cartridge case will not bottom out but instead will stop about 2/3rds of the way down you may need to adjust your FL resizing die to allow more cam over on your press.[B]. Failing to follow this additional step can result in a hard bolt closing or a difficult extraction issue.[/B] Simply by loosening the dies lock ring and screwing the die body down a bout an 1/8th. of a turn at a time or less until your brass cases will bottom out in the case OAL gage ( this I'm certain that you know ) With my .300 Win Mag on my second rifle because of chamber lengths being slightly different between the two rifles , I had to allow for more press cam over in order to allow the case to smoothly fit inside my case gage. Imperative for a reliable feeding cartridge, and I am using bolt action rifles. I'm not referring to C.O.A.L. here as the bullet seating depth (jump factor ) varies with each of my bolt action rifles. Additionally after about 3 - 4 firings I myself have experienced this as the brass hull has conformed to the chamber wall dimensions and must be brought back to SAMMI Spec ,especially if you want a dependable, feedable , and totally reliable round that you plan to use in the harvesting of game. Notes: By changing items such as a rifle barrel even with the use of a chamber go / no gage set you have altered your rifles internal dimensions slightly. ( I'll not go into stacked tolerance issiues here ) suffice to say you will need to go back to the drawing board with your load development. Again Note: Please , I'm not trying to tell you what to do or how to do it. I'm stating that this is how I would approach this small dilemma in hopes of coming to a successful conclusion.[/I] [/QUOTE]
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