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Rifles, Reloading, Optics, Equipment
Muzzleloader Hunting
CVA Accura V2
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<blockquote data-quote="SidecarFlip" data-source="post: 761585" data-attributes="member: 39764"><p>I knew you'd catch that and btw, I really enjoy your video's and your knowledge is a vast storehouse..... now that I've inflated your ego.....<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p> </p><p>I realize the white hots lay on top of the plug in the short recess but I bought a box for fooling with. Thats it. We'll be igniting Blackhorn exclusively in the field and I'll have some extra plugs laying around to modify.</p><p> </p><p>What I'm curious about is what effect opening the flash hole will have on ignition and powder burn. It seems to me that the primer ignition end face is appreciably larger than the flash hole so why not open it up incrementally. One, it would relieve the back pressure (that actually causes the blowback of gasses and the subsequent blackening of the firing pin face and frame) and two, would allow a better flame travel to the powder charge. The only thing I could see as a limiting factor would be average grain size of 209. That would not be a factor with white hots as they are solidified.</p><p> </p><p>I can machine the plugs any way I want to, in fact, I can modify the firearm, I own a machine shop so it's not a big thing with me. Between opening the flashole and shimming the pin retainer to the primer face (you refer to as headspace) I'm thinking that relieving the pressure should allow less of an interference fit between the pin retainer and the primer face and still negate the blowback.</p><p> </p><p>I want to know the determining factor in the flashole dimension or is it an 'all around' determination?</p><p> </p><p>I think this is actually going to be some relatively inexpensive fun compared to my big centerfire rifles......</p><p> </p><p>..............Just picking your brain a bit.....</p><p> </p><p>While on the subject, what about the Thor Bullets and the Precision Engineering non saboted bullets? Opinion, conjecture? My go to will still be the Barnes saboted polymer tipped projectiles for around here. The non-saboted projectiles will be for out west.</p><p> </p><p>We are looking for extended knock down range in the vicinity of 250-300 yards, possibly better, limited by optics of course. I'm not going to put a NF or a Viper or a Leupy Mark 4 on a smoke pole, at least not just yet. The rifles are tubed well enough, Bagara is a premier barrel maker. The limiting factor I see is the projectiles and rate of ignition as it equates to muzzle velocity and bullet weight. The higher the exit velocity the more tolerant projectile weight becomes. The faster it flies, the less gravity impacts the projectile and less bullet drop. I interchanged bullet and projectile but they are both the same in this discussion...... I also realize the twist plays an important factor in stability and too much velocity imparts too fast a spin and can cause the bullet to fly apart......</p><p> </p><p>See, I get technical pretty quick and I haven't even cycled the firearm yet.....<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p></blockquote><p></p>
[QUOTE="SidecarFlip, post: 761585, member: 39764"] I knew you'd catch that and btw, I really enjoy your video's and your knowledge is a vast storehouse..... now that I've inflated your ego.....:) I realize the white hots lay on top of the plug in the short recess but I bought a box for fooling with. Thats it. We'll be igniting Blackhorn exclusively in the field and I'll have some extra plugs laying around to modify. What I'm curious about is what effect opening the flash hole will have on ignition and powder burn. It seems to me that the primer ignition end face is appreciably larger than the flash hole so why not open it up incrementally. One, it would relieve the back pressure (that actually causes the blowback of gasses and the subsequent blackening of the firing pin face and frame) and two, would allow a better flame travel to the powder charge. The only thing I could see as a limiting factor would be average grain size of 209. That would not be a factor with white hots as they are solidified. I can machine the plugs any way I want to, in fact, I can modify the firearm, I own a machine shop so it's not a big thing with me. Between opening the flashole and shimming the pin retainer to the primer face (you refer to as headspace) I'm thinking that relieving the pressure should allow less of an interference fit between the pin retainer and the primer face and still negate the blowback. I want to know the determining factor in the flashole dimension or is it an 'all around' determination? I think this is actually going to be some relatively inexpensive fun compared to my big centerfire rifles...... ..............Just picking your brain a bit..... While on the subject, what about the Thor Bullets and the Precision Engineering non saboted bullets? Opinion, conjecture? My go to will still be the Barnes saboted polymer tipped projectiles for around here. The non-saboted projectiles will be for out west. We are looking for extended knock down range in the vicinity of 250-300 yards, possibly better, limited by optics of course. I'm not going to put a NF or a Viper or a Leupy Mark 4 on a smoke pole, at least not just yet. The rifles are tubed well enough, Bagara is a premier barrel maker. The limiting factor I see is the projectiles and rate of ignition as it equates to muzzle velocity and bullet weight. The higher the exit velocity the more tolerant projectile weight becomes. The faster it flies, the less gravity impacts the projectile and less bullet drop. I interchanged bullet and projectile but they are both the same in this discussion...... I also realize the twist plays an important factor in stability and too much velocity imparts too fast a spin and can cause the bullet to fly apart...... See, I get technical pretty quick and I haven't even cycled the firearm yet.....:D [/QUOTE]
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CVA Accura V2
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