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Rifles, Reloading, Optics, Equipment
Reloading
moly coating?????
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<blockquote data-quote="idaho elk hunter" data-source="post: 1055851" data-attributes="member: 68226"><p>I have studied Hex Boron compared to Moly extensively in many various rifles. There is several things I found it do. First and foremost it will keep the bore very clean with hardly any trace of copper.</p><p> </p><p> Tracking all the information on each load, rifle, bullet, powder combination over 7 different calibers, 43 cartridges, over 80 rifles half of them custom built and half over the counter, this is what I have found.</p><p> </p><p>Custom barrels that are tight and can create overpressure signs earlier than usual now can go much higher on the powder charge without a hint of over pressure. Case in example a 7mm Rem that I built with a very tight barrel, 180 Berger will travel over 3225. Backed off to 3150 it is a tack driver.</p><p> </p><p>The bearing surface will make a huge difference with Hex Boron. The greater the bearing surface the greater the results. I contribute this to friction due to my data.</p><p> </p><p>The hotter the powder is NOT a huge concern. It makes a before and after fps variation of only 11 fps on average. Barrel length makes NO difference.</p><p> </p><p>The larger the caliber is a factor if the powder capacity can push the bullet to magnum velocities. OVER BORE CARTRIDGES ARE MADE FOR HEX BORON.</p><p> </p><p>Here is the interesting part. On the hyper velocity cartridges shooting the hollow points and or thin jacketed bullets that denigrate in the air before they reach the target. They now hold together and are more accurate.</p><p> </p><p>I contribute this to the friction in the barrel is not pulling the jacket rearward as the bullet is traveling down the barrel due to the amount of friction is reduced on the jacket is not melting a "skim" layer of lead between the jacket and core thus aiding the suspected moving jacket. These two factors would cause the hollow point to open and be larger than the factory orifice do to much rearward friction in the bore allowing more air in the hollow point thus aiding it to come further apart.</p><p> </p><p>This is somewhat related to the next phenomenon. Recheck your drop factors. The BC of the bullet will change even if you reduce your load to the same velocity.</p></blockquote><p></p>
[QUOTE="idaho elk hunter, post: 1055851, member: 68226"] I have studied Hex Boron compared to Moly extensively in many various rifles. There is several things I found it do. First and foremost it will keep the bore very clean with hardly any trace of copper. Tracking all the information on each load, rifle, bullet, powder combination over 7 different calibers, 43 cartridges, over 80 rifles half of them custom built and half over the counter, this is what I have found. Custom barrels that are tight and can create overpressure signs earlier than usual now can go much higher on the powder charge without a hint of over pressure. Case in example a 7mm Rem that I built with a very tight barrel, 180 Berger will travel over 3225. Backed off to 3150 it is a tack driver. The bearing surface will make a huge difference with Hex Boron. The greater the bearing surface the greater the results. I contribute this to friction due to my data. The hotter the powder is NOT a huge concern. It makes a before and after fps variation of only 11 fps on average. Barrel length makes NO difference. The larger the caliber is a factor if the powder capacity can push the bullet to magnum velocities. OVER BORE CARTRIDGES ARE MADE FOR HEX BORON. Here is the interesting part. On the hyper velocity cartridges shooting the hollow points and or thin jacketed bullets that denigrate in the air before they reach the target. They now hold together and are more accurate. I contribute this to the friction in the barrel is not pulling the jacket rearward as the bullet is traveling down the barrel due to the amount of friction is reduced on the jacket is not melting a "skim" layer of lead between the jacket and core thus aiding the suspected moving jacket. These two factors would cause the hollow point to open and be larger than the factory orifice do to much rearward friction in the bore allowing more air in the hollow point thus aiding it to come further apart. This is somewhat related to the next phenomenon. Recheck your drop factors. The BC of the bullet will change even if you reduce your load to the same velocity. [/QUOTE]
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moly coating?????
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