...." duplicates factory load"....!

Ronsc

LIberalism is a disease..
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IS it just me or does this come across as nebulouse and useless information when powder companies use this terminology? I for the most part reload to IMPROVE accuracy in my rifles and rarely if ever attempt to " recreate" some unknown factory "recipe". What are your thoughts?
 
I think its mostly so that you can compare your load data with a typical factory loading.

I've only shot 1 or 2 varieties of factory ammo that shot so good I'd want to actually duplicate that load.
 
IS it just me or does this come across as nebulouse and useless information when powder companies use this terminology? I for the most part reload to IMPROVE accuracy in my rifles and rarely if ever attempt to " recreate" some unknown factory "recipe". What are your thoughts?


When I see that, I read it as the powder will tend to generate the same pressure curve as factory loads. We can all agree that ammo manufacturers spend at least some amount of time testing for things like over/under pressure, etc. So it tells me that this reloading powder at that charge weight should be near optimum for the application. It gives an excellent starting point.

The accuracy gains achieved in reloading come from consistency, seating depth optimized to your rifle, attention to detail, etc.
 
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I really do not see how to reproduce a factory load. Reason I feel that way:
1. new brass. Most reloaders are using once or more often fired brass
2. powder could be a combination of powders. I am not mixing powders.
3. unless you have a something to measure pressure you guessing
4, Velocity is just one factor
5. factory loads I do not think are tested in a gun.

I might be completely of base with my thinking but
 
I really do not see how to reproduce a factory load. Reason I feel that way:
1. new brass. Most reloaders are using once or more often fired brass
2. powder could be a combination of powders. I am not mixing powders.
3. unless you have a something to measure pressure you guessing
4, Velocity is just one factor
5. factory loads I do not think are tested in a gun.

I might be completely of base with my thinking but

Modern brass is not really a problem, with out annealing brass is good for 3 firings

Powders not combined in factory ammo, it's purchase in very large quantity and is not always same as we purchases off the shelf. Factory ammo powder is pressured tested each lot and adjusted as needed.

You can get home pressure testing equipment, But velocity is a very good indicator.

Factory loads are worked up with a special receiver and barrel, both are made to SAAMI min specs. Most factory ammo is them tested in various factory rifles.
 
I've seen "duplicates factory loads" mentioned when talking about factory defensive handgun ammo. People want to duplicate the factory load with less expensive components, for practice purposes. They try to duplicate the recoil/noise/flash, or whatever, so they will be better prepared if they have to use the gun defensively.

When talking about factory rifle ammo, the statement makes less sense to me.
 
Modern brass is not really a problem, with out annealing brass is good for 3 firings.

With a very specialized type of high power centerfire rifle brass, that figure is probably accurate but plenty of others can go a lot of reloadings without issue.
 
With a very specialized type of high power centerfire rifle brass, that figure is probably accurate but plenty of others can go a lot of reloadings without issue.

Brass is work hardened, going through the firing and reloading cycle. In loose factory, Rem, Savage, Ruger hunting rifle is the hardening going to effect the accuracy, probably not. When I started reloading, in the 80's, it was 5 firing, then toss the brass. In a better chambered and cut barrel, using bushing dies helps the brass last longer, by working it less. I have found it best to anneal every time, but that is me, I'm willing to put the extra time into.
 
The statement may be an indication that that particular load should work well in those autoloading firearms that were designed to function properly with standard factory ammo.
 
With a very specialized type of high power centerfire rifle brass, that figure is probably accurate but plenty of others can go a lot of reloadings without issue.

Agreed. I have been using the same cases since the late 80s in 3006, 3030, 4570, 7x57, 38/357, 9mm, 45acp. None annealed. None at what I'd consider light loads but not hot rodded. Case failures are rare and typically manifest as small cracks at the mouth. Pockets remain tight. I'd estimate usage in the dozen plus per case. Unless alloys have changed since then my experience indicates brass lasts a long time.
 
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When I think of this term. Handgun loads come to mind and fixed sights...all are regulated for a certain load and duplicating that load will assure the firearm will shoot to poa....
 
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