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Rifles, Reloading, Optics, Equipment
Reloading
OBT method, barrel length vs velocity
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<blockquote data-quote="Tripodmvr7" data-source="post: 1997602" data-attributes="member: 115545"><p>Here is data for a 223 with 53TSX in different barrel lengths.</p><p></p><p>24 inch Node 3 1.022ms Speed 3240fps Pressure 50130 psi</p><p>22 inch Node 3 0.939ms Speed 3250fps Pressure 53980 psi</p><p>20 inch Node 3 0.855ms Speed 3263fps Pressure 58760 psi</p><p></p><p>Powder charges are of course upped to get more pressure and the speed is nearly the same.</p><p></p><p>If powder charge is kept the same, then</p><p></p><p>24 inch Node 3 1.022ms 3240fps</p><p>22 inch Node between 3 and 4 0.970ms 3178fps</p><p>20 inch Node 4 and very close to it 0.917ms (Calced Node 4 = 0.924ms) 3108fps</p><p></p><p>One can see that, say for instance factory ammo that shoots well in a 24 inch barrel, will also perform in the shorter barrels.</p></blockquote><p></p>
[QUOTE="Tripodmvr7, post: 1997602, member: 115545"] Here is data for a 223 with 53TSX in different barrel lengths. 24 inch Node 3 1.022ms Speed 3240fps Pressure 50130 psi 22 inch Node 3 0.939ms Speed 3250fps Pressure 53980 psi 20 inch Node 3 0.855ms Speed 3263fps Pressure 58760 psi Powder charges are of course upped to get more pressure and the speed is nearly the same. If powder charge is kept the same, then 24 inch Node 3 1.022ms 3240fps 22 inch Node between 3 and 4 0.970ms 3178fps 20 inch Node 4 and very close to it 0.917ms (Calced Node 4 = 0.924ms) 3108fps One can see that, say for instance factory ammo that shoots well in a 24 inch barrel, will also perform in the shorter barrels. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
OBT method, barrel length vs velocity
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