different load data for Speer bullets?

[dgang]

After checking with Alliant Powders loading data I found that they only give data for Speer bullets. My understanding is that Speer bullets are clad and not made with the traditional jacket, therefore are softer and require different amounts of powder. Is this true? Is there a source I can access to find the difference in loads between Speer and other bullets of the same weight and configuration? Thanks in advance and good shooting to y'all. dgang

 

[mattsbox99]

Thats not true. Speer uses traditional cup and core manufacturing for many of their bullets. Their HotCor bullets were the first bonded bullet on the market. Hornady, Sierra, and Nosler all do the same.

Cut one in half and you'll see they have a good jacket.

I strongly recommend using data from the bullet manufacturer over any other data.

 

[WESHOOT2]

All bullets differ, and all data should be tailored for the specific components and launch platform.

 

[M'BOGO]

The different alloys used by different manufacturers act differently under the pressures of firing a cartridge. That is why there is always the start low, work up warnings. There could even be alloy differences between lots of slugs/powders/and primers that could affect pressures.

I'm not acting like an expert, or trying to come off as one. A few years ago Midway USA did some caliber specific little reloading books, that listed the component slugs they carried. The group that really stands out in my mind is the .44 Mag, 240 gr. The max loads for the different slugs, with the same powders was all over the place. IIRC, sometimes as much as two grains of powder difference, with only the slug being different.