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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Cold bore shot impact?
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<blockquote data-quote="Teri Anne" data-source="post: 2481406" data-attributes="member: 118816"><p>I actually agree with Wild Rose to a point. It has been my experience over 50+ years of shooting both competitively, teaching and simply plinking that there is no such thing as an accurate cold - clean - bore. Even if cleaning after each and every shot the POI will vary simply because of the residue from cleaning that is going to make the bore of the rifle inconsistent. In competition across the National Match Course for many years as well as long range at 600 to 1000 yards with both Service and conventional match rifles a clean bore will not shoot accurately.</p><p> Rifles used in competition are almost never fired with a clean bore. At the beginning of the match there are sighting rounds, usually two shots that are not only used as sighting shots but also used to foul the bore, burn out any of the residue from cleaning solvents and preservative oils left even after running clean patches down the rifle bore. Some competitors when shooting across the course will fire the first 60 rounds prior to the 600 yard stage without cleaning, then do a brush clean (run a dry brush down the barrel) to expel the accumulation of debris out of the barrel . At 600 yards one is still allowed 2 sighting rounds to which in turn again foul the bore then fire 20 rounds for record in 20 minutes. This is not anywhere close to a cold bore. If one is not shooting a cold clean bore then one might find that the difference between a first shot hit and a group of 3 or 5 shots from a cold to hot barrel will not vary enough to interfere with a 1 MOA or less group. I never group my rifles with a clean bore. They all are fired with at least two to four fouling shots prior to sighting in. I start with a cold fouled bore then shoot a group of 3 to 5 rounds (Whichever the magazine will hold) as fast as I can comfortably shoot accurately. The net result is that all of my rifles shoot 1 MOA or less groups no matter whether the barrel is cold or hot. The result has been over the last 45 years or so, one shot has led to one dead deer from a cold fouled bore. Sorry can't comment on follow up shots other than at the range since I live buy the rule of US Army Instructor/Competitor Lones Wigger, "One shot one kill." By the way his firearms collection is up for auction. Something for all of you to think about. All of his firearms were and still are, "SHOOTERS!"</p></blockquote><p></p>
[QUOTE="Teri Anne, post: 2481406, member: 118816"] I actually agree with Wild Rose to a point. It has been my experience over 50+ years of shooting both competitively, teaching and simply plinking that there is no such thing as an accurate cold - clean - bore. Even if cleaning after each and every shot the POI will vary simply because of the residue from cleaning that is going to make the bore of the rifle inconsistent. In competition across the National Match Course for many years as well as long range at 600 to 1000 yards with both Service and conventional match rifles a clean bore will not shoot accurately. Rifles used in competition are almost never fired with a clean bore. At the beginning of the match there are sighting rounds, usually two shots that are not only used as sighting shots but also used to foul the bore, burn out any of the residue from cleaning solvents and preservative oils left even after running clean patches down the rifle bore. Some competitors when shooting across the course will fire the first 60 rounds prior to the 600 yard stage without cleaning, then do a brush clean (run a dry brush down the barrel) to expel the accumulation of debris out of the barrel . At 600 yards one is still allowed 2 sighting rounds to which in turn again foul the bore then fire 20 rounds for record in 20 minutes. This is not anywhere close to a cold bore. If one is not shooting a cold clean bore then one might find that the difference between a first shot hit and a group of 3 or 5 shots from a cold to hot barrel will not vary enough to interfere with a 1 MOA or less group. I never group my rifles with a clean bore. They all are fired with at least two to four fouling shots prior to sighting in. I start with a cold fouled bore then shoot a group of 3 to 5 rounds (Whichever the magazine will hold) as fast as I can comfortably shoot accurately. The net result is that all of my rifles shoot 1 MOA or less groups no matter whether the barrel is cold or hot. The result has been over the last 45 years or so, one shot has led to one dead deer from a cold fouled bore. Sorry can't comment on follow up shots other than at the range since I live buy the rule of US Army Instructor/Competitor Lones Wigger, "One shot one kill." By the way his firearms collection is up for auction. Something for all of you to think about. All of his firearms were and still are, "SHOOTERS!" [/QUOTE]
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Cold bore shot impact?
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