338 Federal Load data

There's 185 and 225 grain data on Hodgdon's site. The data is for Barnes TSX bullets. Mind you, normally you'd use Barnes data for Barnes bullets(solid copper bullets don't fly the same as a lead core bullet. Has to do with density.), but going the other way shouldn't be a big deal. You don't need data for a specific brand of bullet. Load for the bullet weight.
 
i had good luck with h335 and 210 grainers, had 2lbs for my 30-30 and powder works well in both.
didn't have load data for my bullets either .
just start real low in charge. i started at 36 and worked up to 47. wasn't really going for accuracy till i got to to 42 grains , ijust made batches of 3 in 1.2gr increments up to 42
then .6 grain for next four batches than .2 grain all the way till 47

i think around 45 grains i started making batches of 5 as you could tell load was getting near max as POI wasn't climbing as quickly between batches and barrel heat was quite noticeable.

i don't really chrony loads till i get near max and groups are okay. ( hence the reference to POi rising)
 
My opinion of Speer Grand Slam bullets is they are very little, if any, different than any other cup and core bullet, except they have their name on the base.
Use the data you would for any other bullet of the same weight.
 
I use 47.5 of Varget for 185's and 46 of Varget for 225's, CCI large magnum primers. I have also used BL-C2 in the identical amounts.
 
sunray said:
Mind you, normally you'd use Barnes data for Barnes bullets(solid copper bullets don't fly the same as a lead core bullet. Has to do with density.)
Click to expand...

That isn't quite right. They do fly the same way. With speed for lift and spin for stability. That's identical. The density issue is mono-metal bullets are longer than lead bullets of the same weight creating more surface to surface contact in the bore. This increases friction, which raises pressures. The GMX is a gilding metal bullet so it will be different even from a Barnes which is pure copper. These things really don't matter if you have a chronograph.

Open whatever manual you have to the 180-185gr .338 Federal page and start with the starting load. Work up until your chrony reads the same or close to similar max velocities with that powder, or traditional pressure signs force you to stop. So for 185gr GMX's once the chrony reads 2800fps stop. Your in the zone:)
 
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