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143 ELDX
Lapua brass
40.6gn 2209
Cci primer
12 thou jump

2620 fps out of 21" tube 0.8" groups, I'm holding it back from being better. I suspect 0.6" is the true capability. No pressure signs.

Find one of the 101,038,492,028,382,902 other threads where you can argue over the differences between the calibres.

Cheers

What speed gimp? 20"?

She's almost a full case here? Might be able to another .5 Tops. 2.8" oal iirc

Will be testing some 143 eldx's in my 260 this weekend, 2209 powder, I'm stopping at 41.2gns as I suspect anything over that will be a tad hot

It has a short throat so the further in the pill is seated the higher my pressure went.

As a trade off my fps went up for less powder

I played around with Quickload today and got the high pressure I've been experiencing once I entered the corrected seating depth on the computer. I've backed off to 40gn 2208. Weather looks good...

Only tried 120gn pro hunters, new Lapua brass cci200 primers and 41gr of 2208.
Zero load dev, I get 1" @100m but pressure signs also. Might back off to 40.2 and try again. Haven't chronyed the load...