260 Load Data using Lapua SenarL 136gr

[sib1948]

New to reloading and with Lapua Senar 139gr. found sweet spot with H4350 at 42.1gr. Should I start the SenarL 136gr. at that point or at a range from above and below with that load in the middle?

 

[bodywerks]

So long as bearing surface area are the same from the 139s to 136s you should be ok at 42, but I'd start at 40.5 to 41 just to be safe. There's probably a whole other accuracy node above that 42 grains, too. I'm running 43.2 as my accuracy Load out of my 260, no pressure signs at all.

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[sib1948]

So long as bearing surface area are the same from the 139s to 136s you should be ok at 42, but I'd start at 40.5 to 41 just to be safe. There's probably a whole other accuracy node above that 42 grains, too. I'm running 43.2 as my accuracy Load out of my 260, no pressure signs at all.

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Thanks for the quick response. What I expected, but wanted to know from someone more knowledgeable. Will will working up some loads tonight for a ladder test tomorrow. Have not used the SenarL 136gr. before, but do seem to have the same bearing surface.

PS-Had another promising node on my ladder test at 43.3 with Senar 139gr in my DTA 26" barrel.
Working up loads for my DTA SRS A1 260 26" barrels.

 

[sib1948]

Here is a comparison of 136gr Senar L on left and 139gr Senar on right with H4350 at 43.3 grains at 100 yards.

Looking pretty good to me!

 

[riffraff]

Good info.....what brass are you two using?

 

[sib1948]

Good info.....what brass are you two using?

New Lapua brass. I'm on my 5th reload with no issues so far.