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Hunting
The Basics, Starting Out
alternat method without a chrono--- ?
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<blockquote data-quote="Lenny Foffa" data-source="post: 2913997" data-attributes="member: 100742"><p>Incredible thread and excellent responses. Apparently I have been looking at this in a far too simple manner. I "thought" the following; Ex; A 130 Grn Nosler Ballistic Tip with a G-1 BC of .433, fired from my 270 Win at a velocity of 3000 fps , at 800 ft in altitude at the rifle range, and at 50 degrees in air temp, that shooting a firm 100 yard Zero, results in a drop of 11 inches at 300 yards. ( JBM data ) So if I shoot a group at 300 yards , and the rifle prints 12 to 12.5 inches low ( instead of 11 inches low ) at 300 yards, then that is an indication that my Velocity would not really be 3000 fps, but more like 2875 to 2900 fps. "OR" the G 1 BC number is not correct.( unlikely) Although this simple math has been reliable for me up till now, I must learn these new concepts.</p></blockquote><p></p>
[QUOTE="Lenny Foffa, post: 2913997, member: 100742"] Incredible thread and excellent responses. Apparently I have been looking at this in a far too simple manner. I "thought" the following; Ex; A 130 Grn Nosler Ballistic Tip with a G-1 BC of .433, fired from my 270 Win at a velocity of 3000 fps , at 800 ft in altitude at the rifle range, and at 50 degrees in air temp, that shooting a firm 100 yard Zero, results in a drop of 11 inches at 300 yards. ( JBM data ) So if I shoot a group at 300 yards , and the rifle prints 12 to 12.5 inches low ( instead of 11 inches low ) at 300 yards, then that is an indication that my Velocity would not really be 3000 fps, but more like 2875 to 2900 fps. "OR" the G 1 BC number is not correct.( unlikely) Although this simple math has been reliable for me up till now, I must learn these new concepts. [/QUOTE]
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The Basics, Starting Out
alternat method without a chrono--- ?
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