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Rifles, Reloading, Optics, Equipment
Reloading
Newbie questions about chrono numbers
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<blockquote data-quote="romad97" data-source="post: 1095766" data-attributes="member: 46883"><p>After a year of reloading I finally broke down and bought a chrono. I purchased the new magnetospeed sporter. I went out today and shot a few rounds to gather some data but, I don't really know whether my numbers are good or bad. I am reloading for a 25-06. I am shooting a Tikka T3 lite which has a 22 inch barrel. I am using winchester brass, WLR primer, 52 gr IMR 4831, 100 gr barnes TTSX with a COAL of 3.13 which is .080 off the lands. I can typically get 1 to .75 MOA with this load. Today I finally got to chrono my load and this is what I got. First 4 shots were definaltely low. I am not sure if this is becouse I was shooting a clean cold bore or what but, they were as follows.</p><p></p><p>1. 3013</p><p>2. 3033</p><p>3. 3067</p><p>4. 3098</p><p></p><p>My next string of shots seemed to actually be a little better.</p><p></p><p>5. 3098</p><p>6. 3043</p><p>7. 3063</p><p>8. 3130</p><p>9. 3100</p><p>10. 3144</p><p>11. 3116</p><p>12. 3092</p><p>13. 3128</p><p>14. 3121</p><p>15. 3065</p><p>16. 3108</p><p>17. 3113</p><p>18. 3095</p><p>19. 3096</p><p>20. 3127</p><p></p><p>I disregarded the first 5 shots as they were from a clean cold bore and I came up with the following numbers. An ES of 101 fps, Avg 3110 fps, and an SD of 33 fps. I am not sure if these numbers are considered good, marginal or bad.</p></blockquote><p></p>
[QUOTE="romad97, post: 1095766, member: 46883"] After a year of reloading I finally broke down and bought a chrono. I purchased the new magnetospeed sporter. I went out today and shot a few rounds to gather some data but, I don't really know whether my numbers are good or bad. I am reloading for a 25-06. I am shooting a Tikka T3 lite which has a 22 inch barrel. I am using winchester brass, WLR primer, 52 gr IMR 4831, 100 gr barnes TTSX with a COAL of 3.13 which is .080 off the lands. I can typically get 1 to .75 MOA with this load. Today I finally got to chrono my load and this is what I got. First 4 shots were definaltely low. I am not sure if this is becouse I was shooting a clean cold bore or what but, they were as follows. 1. 3013 2. 3033 3. 3067 4. 3098 My next string of shots seemed to actually be a little better. 5. 3098 6. 3043 7. 3063 8. 3130 9. 3100 10. 3144 11. 3116 12. 3092 13. 3128 14. 3121 15. 3065 16. 3108 17. 3113 18. 3095 19. 3096 20. 3127 I disregarded the first 5 shots as they were from a clean cold bore and I came up with the following numbers. An ES of 101 fps, Avg 3110 fps, and an SD of 33 fps. I am not sure if these numbers are considered good, marginal or bad. [/QUOTE]
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