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Rifles, Reloading, Optics, Equipment
Reloading
Reloading question
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<blockquote data-quote="Lefty7mmstw" data-source="post: 2005319" data-attributes="member: 48043"><p>Are you sure you are getting a reading on the bullet speed and not the gas, etc. coming out behind the bullet? I've had that happen a few times on an optical chrono. My Oehler clocks twice so it will usually see issues like that. On the flip side, if you ARE actually getting tame velocity like that you are going to need a bit more cowbell to get her up to speed. Chamber variances, barrel length, case volume, priming, actual bore diameter, twist rate... So many variables in pressure creation. We had a similar situation happen on a 30-06 load many years back. It shot well and we never chrono'd it for years. It was only really used for short rang to mid range so drop was never an issue; we found out when we put it over a chrono that we were 400 fps short on book vel...</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 2005319, member: 48043"] Are you sure you are getting a reading on the bullet speed and not the gas, etc. coming out behind the bullet? I've had that happen a few times on an optical chrono. My Oehler clocks twice so it will usually see issues like that. On the flip side, if you ARE actually getting tame velocity like that you are going to need a bit more cowbell to get her up to speed. Chamber variances, barrel length, case volume, priming, actual bore diameter, twist rate... So many variables in pressure creation. We had a similar situation happen on a 30-06 load many years back. It shot well and we never chrono'd it for years. It was only really used for short rang to mid range so drop was never an issue; we found out when we put it over a chrono that we were 400 fps short on book vel... [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Reloading question
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