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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
OK.. Now what..!?!
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<blockquote data-quote="Cybra" data-source="post: 27271" data-attributes="member: 936"><p>Hum...well, godd*mn--that's a new one. Looking at the bullet's shank as best I can tell, the "scratches" or marks appear to be linear in nature, and consistent with the chambering--the wavy pattern toward the rear of the bullet is from the shear moment when the bolt closes, so...I think we can say the problem IS in the throat. A bur?--fairly unlikely--look at the marks. From looking at the picture, those marks appear to be present around a good portion of the circumference of the bullet. Carbon build-up is almost surely the cause, so now...what the hell is causing such a dramatic build-up of carbon? You seem pretty compentent to me, so I'm going to venture that your cleaning methods aren't something bizzare, or ineffective, normally. <img src="http://images/icons/confused.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Hum...slippeth me the friends, let me think... Has anyone asked what *type* or powder you're running? I would venture the guess that you're one of WW's slower ball powders &lt;military grade, mabye?&gt; Perhaps Retumbo, maybe RL25. I have also noticed, with certain powders that burn a little hotter, that they typically fowl "less", but that the fowling that is left may sometimes be more difficult to remove. Beats me, I really don't know. DC may be very close with bullet diameters--I would definitely mic them. I get in the habit of microing them, anyhow, as I've noticed differences in OD of the bullets do seem to play a very big part in velocity variations, and a couple other factors. I'd mic the bullets, clean the bore, paying &lt;obviously&gt; lots of attention to the throat, both look and feel, clean them cases up to spiffy-clean, and chamber another round. If the problem goes away, then I'd keep asking myself what some possible causes for such throat fowling might be--all that fowling in there may act as an abrasive that you just don't need! <img src="http://images/icons/wink.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> Hey, best of luck, brother--I'm going to go enjoy my day off. <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Dave</p></blockquote><p></p>
[QUOTE="Cybra, post: 27271, member: 936"] Hum...well, godd*mn--that's a new one. Looking at the bullet's shank as best I can tell, the "scratches" or marks appear to be linear in nature, and consistent with the chambering--the wavy pattern toward the rear of the bullet is from the shear moment when the bolt closes, so...I think we can say the problem IS in the throat. A bur?--fairly unlikely--look at the marks. From looking at the picture, those marks appear to be present around a good portion of the circumference of the bullet. Carbon build-up is almost surely the cause, so now...what the hell is causing such a dramatic build-up of carbon? You seem pretty compentent to me, so I'm going to venture that your cleaning methods aren't something bizzare, or ineffective, normally. [img]images/icons/confused.gif[/img] Hum...slippeth me the friends, let me think... Has anyone asked what *type* or powder you're running? I would venture the guess that you're one of WW's slower ball powders <military grade, mabye?> Perhaps Retumbo, maybe RL25. I have also noticed, with certain powders that burn a little hotter, that they typically fowl "less", but that the fowling that is left may sometimes be more difficult to remove. Beats me, I really don't know. DC may be very close with bullet diameters--I would definitely mic them. I get in the habit of microing them, anyhow, as I've noticed differences in OD of the bullets do seem to play a very big part in velocity variations, and a couple other factors. I'd mic the bullets, clean the bore, paying <obviously> lots of attention to the throat, both look and feel, clean them cases up to spiffy-clean, and chamber another round. If the problem goes away, then I'd keep asking myself what some possible causes for such throat fowling might be--all that fowling in there may act as an abrasive that you just don't need! [img]images/icons/wink.gif[/img] Hey, best of luck, brother--I'm going to go enjoy my day off. [img]images/icons/grin.gif[/img] Dave [/QUOTE]
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