reduced power loads?


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97guns
October 24, 2008, 11:58 PM
what are they - are they loads that have a smaller charge than a reccomended starting load? how much lower can you go from the reccomended starting load? i ask because im planning to reload some 7.62X51 cases and ive read that you should reduce the load by 2 grains, is this the standards rule of thumb?

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Ol` Joe
October 25, 2008, 12:54 AM
reduce 10% of max listed if no starting loads are shown. Don`t reduce starting loads, they`re alrealy reduced.

GRIZ22
October 25, 2008, 01:43 AM
What type of powder and bullet make a difference. How much do you want to reduce?

Ol' Joe is right, don't reduce starting loads. You can actually increase pressures by reducing the charge with some powders.

You can load a 165 gr lead bullet with Unique to make a load that's about the same as a 357 mag powerwise. See Lyman manual.

ArchAngelCD
October 25, 2008, 02:25 AM
Hodgdon has published "Youth Load Data" on their site. They claim you can use H4895 and only H4895. Their formula is 60% of the Max charge listed in their manual. (or on their Hodgdon Load Data site (http://data.hodgdon.com/cartridge_load.asp)) Here is the link to all the information on these Youth Loads (http://data.hodgdon.com/cartridge_load.asp) directly from the Hodgdon site. They are using the term "Youth Loads" but no matter what they call it they are in actuality "Reduced Loads".

**NOTE**
Read all the information and cautions on the page. It's important to follow their directions and NOT to use the data with loads that wouldn't normally use H4895.

Remo-99
October 25, 2008, 03:45 AM
Depending on the intended use, their are all kinds of reasons for reducing loads, say for like cowboy action matches with 30-30 lever rifle etc. to similate a lower blackpowder charge.
As for 308win there is data for reducing it, online. To around 2000fps or even 1000fps.

168 GR. SIE HPBT Hodgdon Clays .308" 2.800"OAL 8.0gr 1060fps 26,800 CUP

info from the Hodgdon site.

NuJudge
October 25, 2008, 04:47 AM
Military brass may be heavier than commercial in the .308, requiring a reduction in powder.

Some other calibers, such as .223, certain foreign commercial brass is way heavier than domestic commercial or military.

"Reduced loads" are generally lower pressure, and sometimes lighter bullets, used for practice and initiating beginners. Most often this is in pistol calibers, but sometimes rifle calibers. Cast bullet rifle loads are almost always lower performance. Different powders have to be used, usually faster burning rate powders. Simply reducing powder charges below recommended minimums can cause a whole host of problems, including erratic ignition, Secondary Explosion Effect, bullets stuck in barrels, and others.

Presuming you are staying with Jacketed bullets, here are some selected reduced loads:
http://www.hodgdon.com/PDF/Youth%20Loads.pdf

97guns
October 25, 2008, 09:48 AM
so if im gonna be loading 7.62X51 brass should i go lower than the reccomended starting load or just start with their reccomendation?

Remo-99
October 25, 2008, 09:54 AM
In 7.62x51 nato brass, starting loads for 308win should be quite safe in my opinion. As long as you are aware the military brass is thicker and has reduced case volume, when your working up loads.

Walkalong
October 25, 2008, 10:25 AM
As ArchAngelCD posted, Hodgdon has a good bit of youth data available on their website.

Also, IMR's SR-4759 (http://www.imrpowder.com/sr4759.html) and Accurate's 5744 (http://www.accuratepowder.com/data/5744.htm) powders are useful for reduced loads in rifle calibers. They were expressly designed for it.

fireflyfather
October 26, 2008, 01:28 AM
DO NOT reduce rifle loads using very slow powders. Fast powders like magnum pistol/shotgun or faster, you can get away with a lot, but with slow burning rifle powders, you don't want to play around with that too much. The Lee manual has some good info on this, as does castboolits.gunloads.org.

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