Author Topic: new reloader - preemptive questions  (Read 969 times)

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Offline SoCal

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Re: new reloader - preemptive questions
« Reply #30 on: February 07, 2018, 08:18:39 PM »

N330 impossible to find at the stores, so now I'm contemplating N320 or N340...


N330 is becoming (slowly) available again BUT there is no one magic powder.  Powder valley has some in 1# only, the 4# went FAST!  Both N320 and N340 work well
If I had known how much better being retired is than working I would have done it FIRST.

Offline Wobbly

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Re: new reloader - preemptive questions
« Reply #31 on: February 07, 2018, 08:55:36 PM »
What would be the better option powder wise? At my club I've heard of people struggling to get PF with 124gr and N320 without exceeding load manual data?


Toby -
► It's as Painter said, and here's why.... Everything we do in reloading is to control chamber pressure.

The primary number in the load manual you want to adhere to and strictly follow is the bullet velocity. The velocity more closely tracks the chamber pressure, and chamber pressure is what determines Max Load.

If you don't have a chrono, then obviously the only reference left for you to follow is the powder weight. But that number is second place to velocity.



The reason for this is that Load Data is developed in test barrels that are 8 inches (203mm) or longer. See photo above. Longer barrels develop greater velocities for any given amount of powder. So in your short 4 inch pistol barrel you'll need to add more powder than given in the manual to achieve the same velocity. Exactly how much more only a chrono can tell you.

► So the order you want to test your ladders is to find the accuracy load first. Then you'll chrono that load to make sure that you are over PF125. If your best accuracy is at PF123, then obviously you'll need to bump that up to PF128-130.


Hope this helps !
« Last Edit: February 07, 2018, 09:10:42 PM by Wobbly »
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Offline Wobbly

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Re: new reloader - preemptive questions
« Reply #32 on: February 07, 2018, 08:58:22 PM »
N330 is becoming (slowly) available again BUT there is no one magic powder.  Powder valley has some in 1# only, the 4# went FAST!  Both N320 and N340 work well.


Toby is in Belgium.
In God we trust; On 'starting load' we rely.

Immature reloaders ask: What's wrong with this gun?
Mature reloaders ask: What did I do wrong ?

Offline TdC

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Re: new reloader - preemptive questions
« Reply #33 on: February 08, 2018, 02:53:16 AM »
Thank you all for the advice!
And for the theory behind pressure,  velocity and powdercharge. (I still have so much to learn)
I'll be looking after accurate loads and then chrony them for PF.

Thank you for putting up with my questions which I am sure you've all answered numerous times

Toby

Offline Wobbly

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Re: new reloader - preemptive questions
« Reply #34 on: February 08, 2018, 08:15:11 AM »
We've had the questions before....

...but never from someone with the ability to send us some Trappist beer.

Hint, hint, hint.  O0
In God we trust; On 'starting load' we rely.

Immature reloaders ask: What's wrong with this gun?
Mature reloaders ask: What did I do wrong ?