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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
The .338 Rogue
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<blockquote data-quote="Pdvdh" data-source="post: 1194518" data-attributes="member: 4191"><p><strong>Re: The .338 Rogue _ Barrel Break-in</strong></p><p></p><p>As I mentioned a couple Posts prior, I'm breaking in my Bartlein barrel prior to shipping it in for nitride treatment.</p><p><strong></strong></p><p><strong>shortgrass</strong> told me he wasn't seeing much copper fouling through his borescope after his test firings following the gunsmithing work he completed for me. He told me he was firing 300gr Sierra MatchKings.</p><p></p><p>Shortly after bedding the barreled action to my rifle stock, I cleaned the bore in preparation for additional barrel break-in. I use KG-1 for carbon removal and Bore Tech Eliminator (BTE) for copper removal. Consistent with what shortgrass had communicated, I didn't find a lot of copper fouling on the copper cleaning patches. shortgrass fired 5 SMKs prior to shipping me the barreled action. So my first bore cleaning followed those 5 SMKs fired down the bore. No cleaning occurred during this string of 5 SMKs. </p><p></p><p>The first bullet I fired down the barrel was a 300gr Berger with a sealed tip. I mean the tip was welded shut. I wasn't even able to drill the tip open. My drill bit ran off center and exited out the side of the bullet rather than following any pilot hole down the tip of the bullet. There was no pilot hole. Solid copper. This is an example of a Berger OTM that would have performed like a full metal jacketed bullet. Since the bullet was boogered up, I used it first for barrel break-in. Cleaning after firing the Berger produced a little bit of copper fouling. Similar to the SMKs, except I only fired one Berger and my initial cleaning following 5 SMKs. Still, not too much copper fouling.</p><p></p><p>I needed more .338 bullets for additional barrel break-in. I remembered I had a box of defective 225gr Nosler Accubonds. These were early production .338 Nosler Accubonds and corrosion formed behind the plastic tips and popped them off the bullets. Nosler sent me a box of current vintage 250gr Accubonds to replace the defective 225s. So I decide to use the 225gr Accubonds with the defective tips. After firing the first Accubond, I found lots of copper fouling compared to the SMKs or the Berger. I fired 4 additional Accubonds, thoroughly cleaning the bore back to bare steel after each bullet fired. Still lots of copper fouling after firing 5 of the Accubonds down the bore. Hmmmm... Pretty sure the Accubonds are causing the increased copper fouling. What to do...? They're defective and didn't really cost me anything. Kinda hate to waste good bullets for barrel break-in. I haven't even mounted a scope on the rifle yet.</p><p></p><p>In the past, I've observed significantly reduced copper fouling by the 7th to 20th bullet fired during break-in of a new barrel. It's a bit tedious, and I'm in no great hurry. I shoot one or two bullets per day. This evening I decide to load and shoot a 300gr SMK. Bingo! Very little copper fouling. Below is a photo showing the huge difference in copper fouling between the Accubonds and the SMK.</p><p></p><p>The patch next to the Accubond was the 3rd copper cleaning patch following the firing of a Nosler Accubond. By 3rd patch, I mean I applied BTE 5 repetitive times to remove copper from the bore, and this is the patch following my 3rd application of BTE. On the other hand, the patch next to the SMK is the patch following my initial application of BTE. It took about 5 applications of BTE to rid the bore of copper fouling from the Nosler Accubonds. It took a single application of BTE to rid the bore of copper fouling from the SMK. Big difference. First time I've experienced this much difference caused by brand of bullet. </p><p></p><p><img src="http://i712.photobucket.com/albums/ww125/pdhorwath/Copper%20Removal%20225%20Accb%20versus%20300%20SMK_zpspxgoxwba.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Pdvdh, post: 1194518, member: 4191"] [b]Re: The .338 Rogue _ Barrel Break-in[/b] As I mentioned a couple Posts prior, I'm breaking in my Bartlein barrel prior to shipping it in for nitride treatment. [B] shortgrass[/B] told me he wasn't seeing much copper fouling through his borescope after his test firings following the gunsmithing work he completed for me. He told me he was firing 300gr Sierra MatchKings. Shortly after bedding the barreled action to my rifle stock, I cleaned the bore in preparation for additional barrel break-in. I use KG-1 for carbon removal and Bore Tech Eliminator (BTE) for copper removal. Consistent with what shortgrass had communicated, I didn't find a lot of copper fouling on the copper cleaning patches. shortgrass fired 5 SMKs prior to shipping me the barreled action. So my first bore cleaning followed those 5 SMKs fired down the bore. No cleaning occurred during this string of 5 SMKs. The first bullet I fired down the barrel was a 300gr Berger with a sealed tip. I mean the tip was welded shut. I wasn't even able to drill the tip open. My drill bit ran off center and exited out the side of the bullet rather than following any pilot hole down the tip of the bullet. There was no pilot hole. Solid copper. This is an example of a Berger OTM that would have performed like a full metal jacketed bullet. Since the bullet was boogered up, I used it first for barrel break-in. Cleaning after firing the Berger produced a little bit of copper fouling. Similar to the SMKs, except I only fired one Berger and my initial cleaning following 5 SMKs. Still, not too much copper fouling. I needed more .338 bullets for additional barrel break-in. I remembered I had a box of defective 225gr Nosler Accubonds. These were early production .338 Nosler Accubonds and corrosion formed behind the plastic tips and popped them off the bullets. Nosler sent me a box of current vintage 250gr Accubonds to replace the defective 225s. So I decide to use the 225gr Accubonds with the defective tips. After firing the first Accubond, I found lots of copper fouling compared to the SMKs or the Berger. I fired 4 additional Accubonds, thoroughly cleaning the bore back to bare steel after each bullet fired. Still lots of copper fouling after firing 5 of the Accubonds down the bore. Hmmmm... Pretty sure the Accubonds are causing the increased copper fouling. What to do...? They're defective and didn't really cost me anything. Kinda hate to waste good bullets for barrel break-in. I haven't even mounted a scope on the rifle yet. In the past, I've observed significantly reduced copper fouling by the 7th to 20th bullet fired during break-in of a new barrel. It's a bit tedious, and I'm in no great hurry. I shoot one or two bullets per day. This evening I decide to load and shoot a 300gr SMK. Bingo! Very little copper fouling. Below is a photo showing the huge difference in copper fouling between the Accubonds and the SMK. The patch next to the Accubond was the 3rd copper cleaning patch following the firing of a Nosler Accubond. By 3rd patch, I mean I applied BTE 5 repetitive times to remove copper from the bore, and this is the patch following my 3rd application of BTE. On the other hand, the patch next to the SMK is the patch following my initial application of BTE. It took about 5 applications of BTE to rid the bore of copper fouling from the Nosler Accubonds. It took a single application of BTE to rid the bore of copper fouling from the SMK. Big difference. First time I've experienced this much difference caused by brand of bullet. [IMG]http://i712.photobucket.com/albums/ww125/pdhorwath/Copper%20Removal%20225%20Accb%20versus%20300%20SMK_zpspxgoxwba.jpg[/IMG] [/QUOTE]
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