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The TAC 15/15i Review Article is here
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<blockquote data-quote="jon.henry755" data-source="post: 605409" data-attributes="member: 29115"><p>Hi Len,</p><p>My comment, which is easily verifiable fact, was that these crossbows produce more KE (Kinetic Energy) at 100 yards than any Compound Bow shot at point blank range on the market. </p><p></p><p>This is very easy to calculate based on a compound bows "Power Stroke" vs. that of the TAC15 crossbows "Power Stroke". </p><p></p><p>When people see any given compound bows speed rating advertised they seem to forget that the rating is almost always given in IBO ratings. IBO is a rating system that is based upon 70 lbs of draw weight at 30" of draw length, using an arrow that is weighing between 5 and 6 grains per inch. </p><p></p><p>How many people do you know that are shooting anything even close to this? </p><p></p><p>Although the biggest selling bow size by far industry wide is the 29" at 70lbs., the fact is that few archers can actually draw this length correctly and maintain good archery form. A 29" draw statistically would be for a man of about 6 feet tall and over 185 pounds. </p><p></p><p>For every 1" below thirty inches of draw weight you would need to subtract 10 fps. of velocity. For every 5 pounds of bow weight below 70 lbs. you can subtract another 10 fps., so without me doing any additional subtractions for arrow weights above 5.5 grains per inch (which affect velocity), it becomes very easy to see why none of today's compound bows can get even close to these numbers. </p><p></p><p>Different shooters may have different configurations and different styles of shooting, but the laws of physics and mathematics are constant and never lie!</p><p></p><p>Regards,</p><p></p><p>Jon</p></blockquote><p></p>
[QUOTE="jon.henry755, post: 605409, member: 29115"] Hi Len, My comment, which is easily verifiable fact, was that these crossbows produce more KE (Kinetic Energy) at 100 yards than any Compound Bow shot at point blank range on the market. This is very easy to calculate based on a compound bows "Power Stroke" vs. that of the TAC15 crossbows "Power Stroke". When people see any given compound bows speed rating advertised they seem to forget that the rating is almost always given in IBO ratings. IBO is a rating system that is based upon 70 lbs of draw weight at 30" of draw length, using an arrow that is weighing between 5 and 6 grains per inch. How many people do you know that are shooting anything even close to this? Although the biggest selling bow size by far industry wide is the 29" at 70lbs., the fact is that few archers can actually draw this length correctly and maintain good archery form. A 29" draw statistically would be for a man of about 6 feet tall and over 185 pounds. For every 1" below thirty inches of draw weight you would need to subtract 10 fps. of velocity. For every 5 pounds of bow weight below 70 lbs. you can subtract another 10 fps., so without me doing any additional subtractions for arrow weights above 5.5 grains per inch (which affect velocity), it becomes very easy to see why none of today's compound bows can get even close to these numbers. Different shooters may have different configurations and different styles of shooting, but the laws of physics and mathematics are constant and never lie! Regards, Jon [/QUOTE]
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