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Extreme Long Range Hunting & Shooting (ELR)
2018 SHOT Show (ELR-Specific): Day 3 (Friday, Jan 26, 2018)
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<blockquote data-quote="ELR Researcher" data-source="post: 1404665" data-attributes="member: 19541"><p>I spoke with David Tubb earlier today as a follow-up to our conversation at SHOT Show 2018 regarding his pending design for an "optimal cartridge" for ELR shooting.</p><p></p><p>Perspective - David is very clear that there is room for advancement in ELR shooting (ELRC-style, out to 2 miles). He feels it is important to reach a much wider group of accomplished shooters, many of whom he believes have concerns about needing to step up to a CT-class rifle and support infrastructure to compete. Specifically, he wants a cartridge design that will utilize fairly standard reloading gear, think reloading with 7/8-14 dies and a standard reloading press.</p><p></p><p>Design - While there had been some consideration of possibly having both a "short" and a "long" cartridge, things have started to gel around just the "long" design. His current "long" design revolves around a .338 LM-bolt-face configuration, which, in comparison to the .338 LM, will have the same rim and base dimensions, significantly less body taper, .350 longer body section, 30 degree shoulder, and a .065 longer neck – resulting in a .415 longer case and a capacity in the range of 125-130 gr. [Obviously not a .338 LM Imp.] This design is not intended to be mag-fed. [As best I know, this matches the realization that few, if any, competitive ELR shooters are loading out of a magazine – think loading block, probably not an actual single-shot action.] Dave expects his new design to yield SDs of less than or equal to 5 fps and that it will work great in his recently announced Tubb ® "Adaptive Target Rifle/ATR" – what Team Tubb will be shooting at the 2018 Ko2M.</p><p></p><p>Infrastructure – David will be releasing his reamer to Dave Manson Precision Reamers, and Dave will offer the reamers. "Superior Shooting Systems/SSS"/DavidTubb.com will be offering A7 tool steel body resizing dies which will include David's unique, integral neck/shoulder sizing bushings - which size both the shoulder and neck, thus supporting the use of .338 or .375 caliber bullets by just picking the appropriate bushing. [The current cartridge design envisions using a .338 caliber neck diameter, easily enlarged to .375 with one stroke of the press.] David will also be offering formed brass (manufactured by Peterson but sold exclusively thru SSS). Finally - after David briefly mentioned a new bullet design - he responded to my question about offering loaded ammo, "Probably." During the subsequent loaded-ammo discussion, he noted that his automated ammo loading line utilizes "load sensors" to measure and separate loaded ammo based on seating pressure. That tech notwithstanding, he mentioned that, when loading with very good bullets (very consistent length bullets), measuring cartridge OAL will also point out differences in neck tension, as spring back will cause rounds with different neck tensions to also show different cartridge OALs. So (tip)…final sort by cartridge OAL (group within +/- .0015").</p><p></p><p>When – Everything except ammo before the 2018 Ko2M (July 2-4). How many teams are expected to be shooting the new cartridge at Ko2M? "A handful."</p><p></p><p>New bullet…hopefully in the next round of conversation.</p></blockquote><p></p>
[QUOTE="ELR Researcher, post: 1404665, member: 19541"] I spoke with David Tubb earlier today as a follow-up to our conversation at SHOT Show 2018 regarding his pending design for an “optimal cartridge” for ELR shooting. Perspective - David is very clear that there is room for advancement in ELR shooting (ELRC-style, out to 2 miles). He feels it is important to reach a much wider group of accomplished shooters, many of whom he believes have concerns about needing to step up to a CT-class rifle and support infrastructure to compete. Specifically, he wants a cartridge design that will utilize fairly standard reloading gear, think reloading with 7/8-14 dies and a standard reloading press. Design - While there had been some consideration of possibly having both a “short” and a “long” cartridge, things have started to gel around just the “long” design. His current “long” design revolves around a .338 LM-bolt-face configuration, which, in comparison to the .338 LM, will have the same rim and base dimensions, significantly less body taper, .350 longer body section, 30 degree shoulder, and a .065 longer neck – resulting in a .415 longer case and a capacity in the range of 125-130 gr. [Obviously not a .338 LM Imp.] This design is not intended to be mag-fed. [As best I know, this matches the realization that few, if any, competitive ELR shooters are loading out of a magazine – think loading block, probably not an actual single-shot action.] Dave expects his new design to yield SDs of less than or equal to 5 fps and that it will work great in his recently announced Tubb ® “Adaptive Target Rifle/ATR” – what Team Tubb will be shooting at the 2018 Ko2M. Infrastructure – David will be releasing his reamer to Dave Manson Precision Reamers, and Dave will offer the reamers. “Superior Shooting Systems/SSS”/DavidTubb.com will be offering A7 tool steel body resizing dies which will include David’s unique, integral neck/shoulder sizing bushings - which size both the shoulder and neck, thus supporting the use of .338 or .375 caliber bullets by just picking the appropriate bushing. [The current cartridge design envisions using a .338 caliber neck diameter, easily enlarged to .375 with one stroke of the press.] David will also be offering formed brass (manufactured by Peterson but sold exclusively thru SSS). Finally - after David briefly mentioned a new bullet design - he responded to my question about offering loaded ammo, “Probably.” During the subsequent loaded-ammo discussion, he noted that his automated ammo loading line utilizes “load sensors” to measure and separate loaded ammo based on seating pressure. That tech notwithstanding, he mentioned that, when loading with very good bullets (very consistent length bullets), measuring cartridge OAL will also point out differences in neck tension, as spring back will cause rounds with different neck tensions to also show different cartridge OALs. So (tip)…final sort by cartridge OAL (group within +/- .0015”). When – Everything except ammo before the 2018 Ko2M (July 2-4). How many teams are expected to be shooting the new cartridge at Ko2M? “A handful.” New bullet…hopefully in the next round of conversation. [/QUOTE]
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2018 SHOT Show (ELR-Specific): Day 3 (Friday, Jan 26, 2018)
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