165 btsp and win 748 for 308

C

cks

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I am new to reloading and I am trying to build a safe load but.. I am confused with all the information out their and in some cases conflicting information.

What I have is win 748 powder, 165 BTSP horandy interlock, federal large primers

Does anyone else load this combination?

The only info I can find with this combination is for Seirra min 40.8 and a max of 43.5 and that is for both the HPBT and the SBT.

Any help would be great.
 
Yes, I load that same combination. I have worked up loads in my Sako and CZ Brno rifles up to 45 grains, for approx. 2650 FPS depending on the rifle. I use mostly Remington brass, Federal is a bit thicker and may need a grain less for the same pressure/velocity.
You are finding conflicting information because barrels and bullets and lots of powder are not completely uniform. You must work up a safe accurate load in YOUR rifle. Your rifle may be at a max load with a starting charge, or may be able to use book max with no problem. Velocity tells most of the tale. If you are getting the book velocity with a standard barrel length that is time to quit adding powder. My Hodgdon manual #26 lists .308/165/W748 with a max of 46 gr and 2700 fps.
 
I do not usually crimp. In my experience loose bullets can be the result of four things
1. - too big expander ball in your size die, . Expander ball should measure about one or two thousandths smaller than the bullet diameter. You should check the specs with your die manufacturer
2. - Lee collet neck size dies? The collet dies can be tricky, the mandrel is sometimes a tiny bit large, and some people don't push hard enough for the collet to size the neck tight to the mandrel.
3. - cases that are too thin at the neck. I had a bunch of old IVI brass ( Imperial) that was so thin that bullets wouldn't hold. No cure for that. Threw the brass out.
4. - if you apply lube to the inside of the case necks before resizing, that could cause loose bullets if you don't remove the lube before seating bullets. I usually just dry brush the insides or use a powdered graphite applicator sometimes.
 
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