358 Winchester cast bullet data

[oscarflytyer]

Is lacking!

Any reason that 200 grn castbullet data for 308 200 grn cast bullet wouldn’t work/be perfectly safe in 358 Winchester? Rifle is a newer BLR.

 

[RBHarter]

I looked at a phone app , my books are buried again , 3031 shows 10 gr difference and IMR 4895 shows 4 gr difference between 308 and 358 with the heavier charge in the 358 . Jacketed data of course .

 

[Spindrift]

From the Lyman 4th ed

 

[Bret4207]

You're going from a very much bottle necked 308 case to a much straighter 358 case. Burn is going to be mucho different.

 

[Ian]

yup, about half a column up the burn rate scale with powder, plus a couple more ticks for cast to get it to burn right. I'd go H335/3031 on the slow end and RX-7 on the fast one unless you're looking for reduced loads.

 

[fiver]

actually going up in bore size works because you have room for more gas volume.
the more room you have the lower the pressure.

this is why stuff like H-322 is a medium slow powder in the 45-70, but is a super fast powder in the 308

 

[oscarflytyer]

yup, about half a column up the burn rate scale with powder, plus a couple more ticks for cast to get it to burn right. I'd go H335/3031 on the slow end and RX-7 on the fast one unless you're looking for reduced loads.

Both low end loads to fire form 308 brass and eventually hunting load as well. Nothing hot rod - 35 Rem velocity probably. H335/3031/RL7 are all perfect as I have plenty.

actually going up in bore size works because you have room for more gas volume.
the more room you have the lower the pressure.

This was kinda my logic for looking at 308 180/200 grn load data. Larger bore should equal bit lower pressure, so as not to get into trouble. Mid-range and work up. Again, no desire to hot rod anything.

Thanx all!

 

[Bret4207]

Were it me, I'd still be looking at some 358 cast data rather than extrapolating. There should be lots of it out there on line.

 

[oscarflytyer]

Were it me, I'd still be looking at some 358 cast data rather than extrapolating. There should be lots of it out there on line.

Woulda thunk it... but... I subscribe to Load Data. Typically (but not always) i can find obscure data like this. But no joy this time. kinda surprised. (also why I posted this here!) other option is start with lowest JB data and use cast.

 

[Ian]

Lyman 45th to the rescue.

 

[Bret4207]

I don't have my load books in here, but I do have my Handloaders Cast Bullets Annuals. This data is from an article entitled "The 356 Rimless", which is a 358 as used in an altered Marlin 35 Rem and loaded with the 336 action limitations in mind. Still 358 Winchester data, just at a lower pressure.

 

[wquiles]

And here is Lyman 46th:

 

[oscarflytyer]

Thanx guys! APPRECIATE all the help!

 

[fiver]

or just do what I did and use jacketed data.
they always use the slower rifle powders for velocity.
but you know which ones you can reduce, and the 358's velocity's ain't screaming fast to begin with,,, so pretty much all of them are on the table.

I went over the top the other way looking for speed as well as accuracy and settled in with RL-19. I'm bettering that Lyman 250gr jacketed data by about 100 fps.

 

[RBHarter]

I went way slower and hit the numbers ...... Didn't have any and wasn't able to get any of the prefered powders for the 35-250 . Full case of too slow to get hurt put me right in the heart of the 250 jacketed speeds . 24" barrel might have helped .

 

[oscarflytyer]

So I know my original req was for cast bullet data. But having said that, also looking for some specific jacketed pet loads. Specifically, for Speer 180 and 220 bullets. Platform is a Browning BLR (if that matters). Looking for something under max (unless max load is the accuracy load), good (Southern - read small) whitetail, and Sounder hog load. Thanx

 

[CWLONGSHOT]

Upon a friends suggestion, I have Tried and now switched to TAC powder for my 358 loads. Wonderfully accurate in my Ruger plus healthy jump in velocity. 225g Sierra is preferred & its mid/upper 2400's from my 20" bbl.

CW

 

[oscarflytyer]

Upon a friends suggestion, I have Tried and now switched to TAC powder for my 358 loads. Wonderfully accurate in my Ruger plus healthy jump in velocity. 225g Sierra is preferred & its mid/upper 2400's from my 20" bbl.

CW

What kind of accuracy are you getting? I really hate to add another powder...

 

[fiver]

TAC has an accurate counterpart called AA-2495 which has an IMR counterpart called IMR-4895.
I'd probably look at 4064 with 225gr bullets just cause that's how I am, and it should make a good all around type setup.

 

[CWLONGSHOT]

I started working loads with 4064 & 4320 when I got the gun. Groups where gettin good but velocity was a warm 35 Rem... GOT THAT!! I wanted more but I also have a Whelen so Im not looking for hair on fire screamers... But I want whats "right" for the caliber.
My buddy kept sending pics and velocities. I was in Cabelas and there was TAC...

i started at 45g stopped at 49.5. No pressure signs on the cases. But the sound of the shot changed. Noticeably. To the point a couple guys at different times walked down to see what the rifle was. 48.5 was as good as the others and velocity wasnt appreciably more. So thats where I decided to plant my flag. YES IT IS OVER BOOK. But reading some respected folks on the campfire. (Barnesness) I was fairly confident I would survive, and well I did. .
The groups from 45 up never where over 1.25 ish. 48.5 was about 7/8 maybe 3/4 if I cheat and measure to middle of the bullets. Recoil is there, but case heads are almost .001 primers cci200 are fine. Just loosing roundness.

A moderate big bore (a35) that shoots 1" is good in my book!!
CW