Appreciate all of you. They are federal primers. I know lead is  more slippery. I slugged the bore to size the bullets. I was concerned the properly sized bullets were resulting in higher pressures, not taking better advantage of existing pressures. I dont have the bench hours needed to expect extra 50fps for lead, or extra 100fps for an inch of barrel. I got a number on a chrono that was much higher than expected. I Shot all 5 but didnt go to my next ladders. Was very concerned.  Really dont see any need to go farther. I'm getting more than I expected. Plenty for a deer or a black bear head on. I will look into case head expansion. There is no split cases, no glock bulge, no function issues, no excessive recoil or noise I can tell with my muffs on.  My brass is landing about 10 feet to my right upon ejection.

Thank you very much.

Really.......
That's good news. I thought that was textbook warning. Can you show me an example where you would be concerned?

Watch "G40 10mm primer" on YouTube
https://youtu.be/pvhXKPVmi5c

I must be over pressure to achieve that velocity.

I'm getting 1325 fps with 200 grain .402 gas checked hardcast out of a lone wolf 6" With accurate#9 powder. I am only at 13 grains. Max load is 14gr at 1216fps with a tmj bullet out of a 5" barrel per my speer manual. I have ladders all the way to max, but I stopped because the velocity was high. Will also note book calls for oal of 1.250, I am at 1.2485 because of the wide meplat.
Is it the perfectly sized .402 bullet driving pressure? I cant see oal coming into play. 1" of barrel shouldn't do that. Thanks guys!

Thanks for the tip

Excellent. Much appreciated.

Excellent info. Thank you. How critical is the taper crimp in relation to pressure? I can deal with poor accuracy if I end up with a learning curve, but I have grown quite fond of my fingers....and my wife (for unknown reasosns) thinks I have a pretty face. I'd rather not mess that up. Is it accurate that seating depth has a far greater effect on pressure, and that or a powder mistake (charge or powder mix up)is what will cause an pressire issue that exceeds flattened/flowing primer or brass bulges? I'm very new to this and understand when something goes wrong, it can go very wrong. I have no feel for what is black and white and what is gray with reloading.

Loading some wfn 200 gr hardcast. Never taper crimped before, but have read on it. Have the lyman 3 set die with taper crimp. Using a g40 with lone wolf barrel, heavier spring and all metal guide rod. Slugged barrel at .401, bullets are .402. Lubed and gas checked.
Starting with 7 grains of longshot. New starline bass. Large pistol primer. Max load is 8.2.  Any tips on oal, crimp, powder increments, or anything else you wish you knew when starting? I've loaded 45-70 and .44mag, But still new. I can post details of bullet if needed. I have a mentor who has helped me get started,  trying not to wear out my welcome. Using for target, whitetail,  and black bear backup when bowhunting. Thanks!

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