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Rifles, Reloading, Optics, Equipment
Reloading
What chronograph
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<blockquote data-quote="Gcan" data-source="post: 1613935" data-attributes="member: 102867"><p>I'm watching this thread and simply cannot agree with those who claim that the mag speed doesn't affect group size. I have seen this claim is not true. We develop loads based on deviation and the harmonics of the barrel. If you put just about any load in a 4" OD test barrel with low deviation they all shoot same hole or there abouts. The large OD is too stiff to vibrate. The simple fact that tunable breaks can open or close a group is absolute evidence that any weight on the end of a barrel affects group size. My cans move POI. However, I find that if Im going to use a can on any rifle, for max accuracy I must develop the load with the can on the gun. </p><p></p><p>Try developing a load without your heavy steel break and then shooting that same load with the large break on. While it might occasionally happen that no difference is noted, that is the exception not the rule. I suspect that people shooting a mag speed on a 20" hvy varmint or straight 22 cal barrel don't experience the effects of a few oz hanging off the muzzle the same as someone using a 26" light varmint or hunting taper might. </p><p></p><p>Unless your bullet contacts the chrono, The only chronos that cannot affect group size are opticals and labradar. </p><p>Any other claims are simply disproved by the laws of physics. </p><p></p><p>The labradar is pretty simple to use if you read the manual. And it is far more accurate than the mag speed or any optical. </p><p></p><p>The labradar also has one advantage that in inarguably beneficial to long range shooters that all others lack. </p><p></p><p>I can track speeds from muzzle to 100 yards, extrapolate pretty accurate drop/bc tables. Try that with a mag speed. So IMHO just spend the money on the labradar. Learn to use it correcty. You will buy one sooner or later anyway. Try selling your used mag speed. You might get 50-70% of what you paid and in the end the labradar will only cost you more.</p></blockquote><p></p>
[QUOTE="Gcan, post: 1613935, member: 102867"] I’m watching this thread and simply cannot agree with those who claim that the mag speed doesn’t affect group size. I have seen this claim is not true. We develop loads based on deviation and the harmonics of the barrel. If you put just about any load in a 4” OD test barrel with low deviation they all shoot same hole or there abouts. The large OD is too stiff to vibrate. The simple fact that tunable breaks can open or close a group is absolute evidence that any weight on the end of a barrel affects group size. My cans move POI. However, I find that if Im going to use a can on any rifle, for max accuracy I must develop the load with the can on the gun. Try developing a load without your heavy steel break and then shooting that same load with the large break on. While it might occasionally happen that no difference is noted, that is the exception not the rule. I suspect that people shooting a mag speed on a 20” hvy varmint or straight 22 cal barrel don’t experience the effects of a few oz hanging off the muzzle the same as someone using a 26” light varmint or hunting taper might. Unless your bullet contacts the chrono, The only chronos that cannot affect group size are opticals and labradar. Any other claims are simply disproved by the laws of physics. The labradar is pretty simple to use if you read the manual. And it is far more accurate than the mag speed or any optical. The labradar also has one advantage that in inarguably beneficial to long range shooters that all others lack. I can track speeds from muzzle to 100 yards, extrapolate pretty accurate drop/bc tables. Try that with a mag speed. So IMHO just spend the money on the labradar. Learn to use it correcty. You will buy one sooner or later anyway. Try selling your used mag speed. You might get 50-70% of what you paid and in the end the labradar will only cost you more. [/QUOTE]
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