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December 10, 2010, 06:11 PM | #1 |
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Join Date: December 5, 2009
Location: Valles Mines, Missouri
Posts: 142
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Learning some stuff w/my first Chrony
I've learned:
ALL the factory rounds I have are faster than my reloads. This includes 38 spl, 357 mag, and 45 acp. What I THOUGHT was a hot/fast round in 357 due to the kick and flash (20 grains Win 296 under a 125 grain jhp) is actually slower than factory Remington with the same bullet, AND over 120fps slower than my loads of 10 grains of HS-6! (got average of 1364/sec out of this, 1402 out of factory Remington, only 1256 with the 'almost violent' loads of 296) Of course, I'm shooting all 4" barrels, I'm sure a 6"+ would increase speeds and probably work better with different loads. I fired 6 of each and averaged the speeds. No matter, I've found something new and interesting! Steve W.
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December 10, 2010, 07:59 PM | #2 |
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Join Date: July 11, 2009
Posts: 389
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Chronographs are fun, and eye opening.
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December 10, 2010, 09:43 PM | #3 |
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Join Date: September 18, 2008
Location: Marquette,Mi
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I was so happy when I got my first chrono. My "accurate" rifle loads were very slow with terrible ES and ED. So I got to do a whole bunch of shooting and load development. Now I do load development a little different,
I borrowed an idea from a gunsmith on longrangehunting.com. He shoots loads over a chronograph and finds max pressure and backs off 2 grains with large cases and find he gets 1/2moa loads with usually less then 20 ES. I have had great luck with that style and I tweak my loads after sometimes just like everyone else. I have done it this way 4 rifles and 1 243 center grip pistol. |
December 10, 2010, 09:49 PM | #4 |
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Join Date: June 25, 2008
Location: Austin, CO
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A chrony is an awesome piece of equipment. I consider it required for handloading. Considering that a decent unit is $80, I don't know why anyone would be without one for long.
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December 10, 2010, 10:18 PM | #5 |
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Join Date: May 2, 2002
Location: Only1/2WayThere
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Hmmm... That's not a very "hot" 125gr load with the 296. I run only a grain less with a 140gr XTP. My combination with the 140 is accurate but doesn't have outstanding ES and SD, and runs a bit slow too.
But the moral is, chronographs can be fun and educational! So many times the results make you go
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December 10, 2010, 10:51 PM | #6 |
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Join Date: February 21, 2002
Location: Transplanted from Montana
Posts: 2,311
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YEAH! They are a lot of fun! But it's an absolute knee slappin' gut buster when someone shoots the chrony.
I haven't had the fun of shooting mine, but my son has shot the sky filters out twice.
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December 12, 2010, 07:25 AM | #7 | |
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Join Date: December 5, 2009
Location: Valles Mines, Missouri
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Quote:
I stopped at 20 due to the noise/kick and the slightly flattened primers. I was assurred my GP100 would handle more, but I was going by seat-of-the-pants feel. The 296 just felt more like 'explosive' than 'accelerant'!
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Circa 1964: Rocky to Bullwinkle: "But that trick never works!" But Bullwinkle tries it anyway...again and again |
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