Armory Sponsor
Posted: 7/25/2008 3:53:37 AM EDT
|
New to reloading and had a question. I am using H335 and shooting Hornady 55 GR FMJ. I have a Lyman manual (48th edition) and on page 144 it says for a 55 GR bullet to use 24.3 grains as the starting load and 27.0 as the maximum. This is for a jacketed SPT. The Hodgdon website states loads lower than this: 55 GR. SPR SP Hodgdon H335 .224" 2.200" 23.0 3018 40,800 CUP 25.3 3203 49,300 CUP So my question is does the powder grains differ if you're using different kinds of projectiles such as spitzer as compared to FMJ even if using the same grain of projectile? Thanks to everyone on this site. I have learned alot from the forums you have at the top of the board. Keep them coming. |
|
That is why reloading is a bit of work......most of the time bullets of similar wt and construction will behave the same...but that is generalization........it matters more about bearing surface.....so the best advice...is take the data of the Lyman and work up from the bottom in say increments of 0.3gr....looking for accruacy, reliability, and safety that will keep you safe! There is leg work to reloading! A word of caution.....in the 223 it does not make as much difference.....but one has to look at data sources for case make, primer make, and such....take the 308 for instance...Hodgdon uses WW brass whereas Sierra uses Federal brass....case capacity differnces can lead to pressure problems.... So follow the load data to the letter and work up! |
|
Load data varies. The manual writers and publishers vary, as to the equipment and components they use to "test" their loads. Not to mention, their level of comfort with your safety. But....more to the point.....note: 
Taken from the SPEER web site. So........buy the manual to suit the bullets you use. Or, KNOW that re-loading is part experimentation at times. Know your own level for RISK. Use re-load data from a reliable source. Changing components (from what the BOOK says) will more than likely affect things (and could be dangerous). IF you decide to "experiment." When starting with a NEW load, start low and work your way up. Aloha, Mark |
|
This is one of the most common "problems" you'll run into, and it's the prime reason to avoid starting with maximum published loads. Pick one or the other. Start with a charge weight 10% less than maximum. Work through a series of loads increasing in 0.3 grain increments until you find one that yields the best accuracy in your rifle, you hit the maximum charge weight shown, or something scary starts to happen. Read your manuals to figure out "scary". The maximum safe load in your rig might be a little less than the maximum charge in one of your references. |
Armory Sponsor