.338 ARC rabbit hole

[Olderthan dirt]

Who else has gone down it?
I am working on super subsonic loads for it.
I am swagging 365gr bullets for it.
Going to load around 1000.
I really like this over 300blk so far.
If using a gas gun you don’t have to fiddle with the gas to operate when switching between sub and super.
Waiting on my can to get paroled.
I was loading 225gr sst bullets super and subsonic. Wanted something to hunt with so decided to make my own.

 

[WV Hitman]

I hope this works out for you. Inventer of the .300 Whisper (aka Blackout) is my good friend, JD Jones. Each summer he'd bring different guns to test on crop damage deer. The .338 JDJ was one of them. Not quite like the ARC, but very close. Long subsonic bullets usually kill by tumbling. 300 gr. Sierra HPBT Match bullets just didn't do it. Poor damage, minimal exits.
What I found in the .300 Whisper was to use the longest round nose bullet I could find (Sierra 220 RN). This greatly increased the knockdown (95%) and internal damage. I took a large 8 pt. buck at 240 yds. in a driving rain storm- dropped & dead. I've taken about 100 deer with this bullet. Never had the desire to go with the other Whispers (the .375 JDJ was really poor).
Your pictured bullet might work- hope so, but see if you can find some long, heavy, "soft nose" bullets. Bet they do better.

 

[Wolfdog91]

I'm looking at doing it for cast bullets .

 

[linebaugh]

Keep posting with testing please. Im interested and woukd happily read your results.

You say swaged bullets? Swaged or cast? Good bullet profile BTW and if its swaged its gonna be soft and be deadly and carry energy well at that weight. I had a very hard time getting acceptable (to me) accuracy with cast in a subsonic .375 project so I am curious what you get for results.

 

[SKWERLZ]

I’m planning on doing a 338 arc sometime.

 

[Olderthan dirt]

I'm looking at doing it for cast bullets .

I used to cast during the winter in illinois.
Florida doesn’t get cold enough to cast.
During summertime lead almost melts by itself here.

 

[Olderthan dirt]

Keep posting with testing please. Im interested and woukd happily read your results.

You say swaged bullets? Swaged or cast? Good bullet profile BTW and if its swaged its gonna be soft and be deadly and carry energy well at that weight. I had a very hard time getting acceptable (to me) accuracy with cast in a subsonic .375 project so I am curious what you get for results.

Kind of both
I swage down 223 case, swage down the front to bore ride diameter, trim off the rim, cut off the neck, fill with pure lead.
Gives me 365 grain.