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mikld
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Posted: May 08 2018 at 9:19am | IP Logged Quote mikld

Using a chrony for your ammo is giving you hard and fast
data on what your handloads are doing. No comparison with
something you don't have...[


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Old Ranger
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Posted: May 08 2018 at 1:52pm | IP Logged Quote Old Ranger

Craig, I have utmost confidence in your loading approach
with this, and other bullet combinations. You and I both
have created countless rounds without a chronograph, as
have tens of thousands of reloaders before us. I'm sure
we're not missing much really. I know I don't lie awake
at night thinking I need to buy a chronograph or stop
loading. And I doubt you never do either.

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M700
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Posted: May 08 2018 at 5:57pm | IP Logged Quote M700

Desert Eagle41 wrote:
Well Guy funny you bring that up. The little data there is at Incepter is the same data that is at Hodgen website!! I mean exactly the same like one copied the other!! I really wanted to use Alliant Power Pistol powder anyway and there is no data available for 65g bullets. So this is my problwm.   Craig


Call 'em and have a chat.

They made the danged lightweight bullets, they oughta know what makes 'em work.

Guy
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Dave T
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Posted: May 17 2018 at 9:17pm | IP Logged Quote Dave T

My wife bought my Ohler Model 33 for me in 1983. By then I'd been
reloading for over 12 years. I have never used the data to find the hottest
load I could but rather, more often than not I end up cutting back on the
charge as I'm getting too much velocity.

Loading manuals are so varied and generally not reflective the actual
results I get that the chronograph has always proved very helpful in
determining exactly what my handholds are doing. Also, the extreme spread
has proven helpful in finding efficient and consistent loads and powder
choices.

YMMV,
Dave

Edited by Dave T on May 17 2018 at 9:19pm


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Desert Eagle41
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Posted: May 18 2018 at 5:17am | IP Logged Quote Desert Eagle41

Back to my original problem. The published data was too light to work the actions on several guns I was testing with the 65g bullet.Power Pistol was the best powder but I had to guess on the load. I have e-mailed Alliant but they have not responded yet. I used a crony to compare loads but the readings were very high so I am testing again. Craig

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Desert Eagle41
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Posted: May 25 2018 at 7:51am | IP Logged Quote Desert Eagle41

As stated on the other thread Alliant e-mailed me to say there is no data from them. I am retesting soon. Craig

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Paul B.
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Posted: May 25 2018 at 1:27pm | IP Logged Quote Paul B.

I use a chronograph during my load work ups for a new bullet or
powder and find it very useful. I don't bother using it for handgun
ammo though. The one time I did I executed the Chrony. My first
chronograph was an Oehler M10. I finally put a bullet through that one
simply because it spent more time going back to Oehler than one the
range measuring velocity. A total POS.
Here is how I use a chronograph for load work up. First, and this id for
rifles,OK? Powders are designed to burn within certain pressure
parameters. Go below or above those parameters and crazy things
happen. One with slow burners is the S.E.E/P.E.P. OR D.D.T. effect
which we all know is a serious KABOOM. Of course, too much powder
can quickly give the same results, especially with the faster burners.
I'll try to keep this simple and call it Powder X. "X" is a medium slow
burner similar to one of the 4350's. Go below the start level and the
S.E.E. thing rears it's ugly head. Assume for this set of comments that
as charges are increased, velocity goes up basically the same and
pressure. Say 50 FPS +/-10 FPS. It's when you are at or near the
maximum load for that rifle, not any book max but the max FOR THAT
RIFLE is where you see velocity changes. It might be a massive
increase or decrease in speed. It might even be no change whatsoever
again in the 10 FPS +?-range. It would be prudent to back off at least
one grain and preferably two grains.
This system comes in handy when working with a cartridge that the
factories deliberately keep at a lower pressure level due to earlier weak
guns chambered to the round. The 7x57 comes to mind right off.
Factory Winchester ammo in the 154 gr. load supposedly does 2640
FPS IIRC. They must use a 30" barrel as I only get 2550 FPS from a
22" Winchester M70. I get 2800 FPS with no signs of pressure with
W760 and the 140 gr. Nosler Ballistic tip. I did get to 2880 but bolt lift
on a 110 degree day was starting to be very slightly sticky. At 2800
FPS primers are still round, primer pockets after 5 reloads are still tight
and accuracy with the load is outstanding.
Another example is my .280 Rem. which does 2900 FPS with the 160
gr. Speer Grand Slam (old two core version) and accuracy is in the .75"
average for the five groups tested.
If one wants to try it, using graph paper and marking powder charge on
the bottom and velocity number on the left, run a 45 degree line up the
graph and plot the velocity. Makes for a very interesting picture of the
velocity increase.
The nice part is it gives you a way to know where you rifle decides too
much is too much without blowing it up. I've been using it since the
mid 1980's and it's worked just fine. All I can add is ith's worked for
me.
Paul B.
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M700
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Posted: May 25 2018 at 7:17pm | IP Logged Quote M700

Well stated Paul.
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