data for 357 Mag, Win 296/158JHP
I have been reloading for over 20 years and in every manual I have on Winchester data (including Winchesters) has always listed the reload data for .357 Magnum with a 158 JHP at 16.6 grains with the caution of never loading a lower charge.
Today 10-10-2009 I happened to spot a new load data manual while buying a new supply of Winchester powders. This 2009 manual now lists 16.7 as the max load and suggested I get more data on the internet site.
In logging onto their site I now discover that in the 2009 load data it lists 15.0 as the minimum charge and 16.7 as the maximum for this powder/bullet combination.
My questions are as follows:
Since I still have some 296 dating back into the mid 90's I need to know if the Win 296 powder formula has been changed or is it still the same powder? Is it safe to use the older powder at the new load specs? The powder is still good as it has been properly stored.
What is the reason for the change in reload data since Winchester was always concerned about squib loads when loading less than 16.6 grains of Win 296. (Yes I am using Mag primers)
Thanks for the attention on this. I have always been a cautious and attentive reloader and just want to be sure.
Steve
Today 10-10-2009 I happened to spot a new load data manual while buying a new supply of Winchester powders. This 2009 manual now lists 16.7 as the max load and suggested I get more data on the internet site.
In logging onto their site I now discover that in the 2009 load data it lists 15.0 as the minimum charge and 16.7 as the maximum for this powder/bullet combination.
My questions are as follows:
Since I still have some 296 dating back into the mid 90's I need to know if the Win 296 powder formula has been changed or is it still the same powder? Is it safe to use the older powder at the new load specs? The powder is still good as it has been properly stored.
What is the reason for the change in reload data since Winchester was always concerned about squib loads when loading less than 16.6 grains of Win 296. (Yes I am using Mag primers)
Thanks for the attention on this. I have always been a cautious and attentive reloader and just want to be sure.
Steve
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I'd use the data from the web site. It will be kept up to date.
I've used the same loads for powder that is 25yrs old and some new stuff and see no difference.0
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