Range Report 243 load ?

[killer-e]

I recently purchased a 243 and started load development based off some things that I read on here started at 41.5grs of h4350 come to find out it’s way over book Max hodgdon online manual says 37.5 is max It shoots really well primers look good don’t know what to do would you use this

 

[z28kid]

What bullet are you using?

 

[mobenzowner]

Looks like he's using a 105 grainer

 

[z28kid]

Saw that...
They list max charge pressure well below the 243smax at 60000 also.

 

[FCS]

CUP is listed, not PSI

52,000 CUP is max SAAMI for 243 Win

 

[killer-e]

So what’s the consensus is it safe to continue on?

 

[Milo 2.5]

So what’s the consensus is it safe to continue on?

What is your barrel length? Are you shooting a 105 Amax?

 

[killer-e]

26 inch and they’re 105 berger hybrids

 

[Milo 2.5]

If your seat depth is close, or case coal, good to go.

 

[Milo 2.5]

That CUP shit baffles me.

 

[Long Range 338]

I would back off. Here is the page from the Berger manual.

 

[Milo 2.5]

I would back off. Here is the page from the Berger manual.

The Berger manual one of the most conservative out there, they will tell you themselves, all data QL generated, and they stopped short.
Hornady manual lists 41.9gr of H4350 for their 108 ELD, 2.700" OAL, not the same bullet of coarse, but a bullet with more bearing surface than a hybrid.

 

[kswaterfowl]

I just looked at hodgdons website, and it seems very conservative for the 243. If you look at past threads on 243 loads, there are plenty of people that are running 42+ gr of h4350 with 105's and heavier bullets.

 

[Kevins750]

40.5gr in lapua brass with 107smk gets me 2970 26" 8 twist.

 

[killer-e]

40.5 gr in lapua brass with a 105 hybrid Gets me 3010 26” 8 twist new ai ax barrel 30 rounds on it. But it doesn’t shoot quite as well as the 41.5

 

[kswaterfowl]

Here is an old 243 thread that has some good data.

243 Win Loads

I feel the 243 is too far valuable to be intermized with 3 other calibers on one post so please post your best 243 load here. All Grain bullet weights, please tell info on but not necessarily in this order: brass, bullet type, powder, powder weight, bullet, bullet weight, OAL, group size, etc...

www.snipershide.com

 

[killer-e]

Thank you for the info that’s actually the thread where I got my beginning load data

 

[kswaterfowl]

I never noticed how low all the max charges were for the 243, until I saw your thread. And I was thinking there is no way that it's that much lower than the 6mm Creed. Especially since the 243 has more case capacity.