Attempting my first ladder test

[HSNARC]

Ive got my new .260 and im ready for load development so to save time and money im going to try my first ladder test.

Im going to be using necked down 7-08 win brass fed 210's 123gr sie hpbt's

Ive got some RL-17 and some H4350, my question's are what are appropriate charge weights to start with?,and should i test with my bullets jammed even if i plan to shoot them at mag length?

I know rl-17 isnt very popular in .260 but when i picked up my rifle my smith gave me a target with a 5 shot group in the .2 range and he said he shot it with 44gr of rl-17 and 123gr sierras jammed, at 2900fps and no pressure signs.

 

[LR-WSM]

Re: Attempting my first ladder test

what was the smith's COAL on the jammed round. 123 Sierras 1.295" long

 

[HSNARC]

Re: Attempting my first ladder test

well im not sure cause he said jammed but didn't bother to write down the measurement. it was a pet load that worked well in his rifle and when he tried it in mine he just called it jammed.

 

[LR-WSM]

Re: Attempting my first ladder test

Would be worth finding out, yes. There are alternatives with bottom metal if you need some extra length. AI mags can be modified to accept 2.9?". Wyatts extended boxes. CDI precision makes one and so does Glenn Seekins.

If your gonna jump your bullet just start at max magazine length and work back in .005 increments with a minimum of 5 rounds per increment.