Post by: yorketransport on June 17, 2018, 08:54:34 PM
(https://i.imgur.com/nfrPGjP.jpg?1)
left to right: 338 RCM, 338 Boondoggle, 338/375 Ruger
(https://i.imgur.com/LxSyIjW.jpg?1)
338 RCM, 300 WSM, 338 Boondoggle
The loaded round in the picture is the 338 Boondoggle loaded with a 250gr Hornady HPBT with an OAL of 2.940". This will easily function through either a Wyatt's MBE-4 internal mag box or the Alpha Type 3 WSM magazine. Unlike the 338 RCM, this should actually match the 338 Win Mag with bullets in the 250gr class. :tup:
With a couple small adjustments I think it will be a winner.
Post by: jasnt on June 17, 2018, 09:57:44 PM
Post by: Biggerhammer on June 18, 2018, 10:21:16 PM
Post by: Dan-o on June 18, 2018, 11:01:38 PM
Post by: kentrek on June 18, 2018, 11:06:17 PM
Post by: Duckslayer89 on June 19, 2018, 12:17:46 AM
Post by: yorketransport on June 19, 2018, 05:40:22 PM
Give me 5 weeks and I can have a reamer so as to stuff a .338 bullet in that center case and fire form it to look a whole bunch like the cartridge on the right.🙃
You can't start any new projects until you've got a 375 BME up and running. :chuckle:
What kind of velocities would you expect with 250 gr bullets
It should sit right around 2600 fps from a 24" barrel, right in line with what I've seen from a 338 Win Mag. 250s would be what I consider on the heavy side for this case volume, just like the 338 Win Mag.
Yorke have you reloaded for 338 RCM? I have one I’m getting close to needing to reload for
I did for a little while and I never got any of my handloads to match factory ammo performance. Hornady uses magical pixie dust powder in their factory loads which isn't available to reloaders. In my experience I could only get within about 50-75fps of factory ammo performance unless I was willing to push the little case pretty hard.
I was debating last night on going 358 instead of 338. It would make a heck of a mid range elk gun. :tup:
Post by: kselkhunter on June 19, 2018, 06:32:03 PM
As an admitted 35 cal dork, I'd like to do a 358 STA for my next build. Flinging 250s at 2800fps, and some 270gr and 310gr bullets that would be lower velocity hammers on game. But that is definitely not a short action. My current "short action" 35 cal build is on the other end of the performance scale (250s at 1900-1950 fps in 20" barrel). :chuckle:
So I'm curious where you end up on this build. And how fast you can get the 250gr 338s (or 358s) to go in that short action boondoggle. Tagging along.
Post by: jay.sharkbait on June 19, 2018, 06:40:21 PM
6.5 Creedmoor, blah blah blah
BC, blah blah blah
Small primers, blah blah blah
Barricade stop
MILS
Post by: Biggerhammer on June 19, 2018, 07:16:28 PM
Post by: yorketransport on June 19, 2018, 07:57:59 PM
Seems like you could get the velocity higher than that. What is the case capacity?
As an admitted 35 cal dork, I'd like to do a 358 STA for my next build. Flinging 250s at 2800fps, and some 270gr and 310gr bullets that would be lower velocity hammers on game. But that is definitely not a short action. My current "short action" 35 cal build is on the other end of the performance scale (250s at 1900-1950 fps in 20" barrel). :chuckle:
So I'm curious where you end up on this build. And how fast you can get the 250gr 338s (or 358s) to go in that short action boondoggle. Tagging along.
Case capacity should end right around 82.0gr H20 compared to the 338 Win Mag's 85.7gr (once fired Rem case). It's very possible that I could hit closer to 2750+ fps with a 250gr bullet and the right load. I thought the 358 version of this would make a good alternative to the 358 Win, which I do love.
I bet the 358 could get a 250gr bullet up to nearly 2800fps from a 24" barrel and the 338 would be around 50-75fps behind with the same weight bullet.
You should neck it down to 6.5.....
6.5 Creedmoor, blah blah blah
BC, blah blah blah
Small primers, blah blah blah
Barricade stop
MILS
Just for you, I call this one the 6.5 BS Tactical (Boondoggle Short obviously). It's loaded with a 130gr Berger AR Hybrid at 2.930"
(https://i.imgur.com/fRmU5Rt.jpg?1)
6.5x47 Lapua, 6.5 Creedmoor, 6.5 BS Tactical, 338 Boodoggle, 358 Boondoggle (200gr TTSX)
Post by: jay.sharkbait on June 19, 2018, 08:31:31 PM
I'm digging the 6.5, but all the Instagram operators would whine as it would damage their A36..... oops AR500 targets.
Post by: kselkhunter on June 19, 2018, 08:33:46 PM
Seems like you could get the velocity higher than that. What is the case capacity?
As an admitted 35 cal dork, I'd like to do a 358 STA for my next build. Flinging 250s at 2800fps, and some 270gr and 310gr bullets that would be lower velocity hammers on game. But that is definitely not a short action. My current "short action" 35 cal build is on the other end of the performance scale (250s at 1900-1950 fps in 20" barrel). :chuckle:
So I'm curious where you end up on this build. And how fast you can get the 250gr 338s (or 358s) to go in that short action boondoggle. Tagging along.
Case capacity should end right around 82.0gr H20 compared to the 338 Win Mag's 85.7gr (once fired Rem case). It's very possible that I could hit closer to 2750+ fps with a 250gr bullet and the right load. I thought the 358 version of this would make a good alternative to the 358 Win, which I do love.
I bet the 358 could get a 250gr bullet up to nearly 2800fps from a 24" barrel and the 338 would be around 50-75fps behind with the same weight bullet.You should neck it down to 6.5.....
6.5 Creedmoor, blah blah blah
BC, blah blah blah
Small primers, blah blah blah
Barricade stop
MILS
Just for you, I call this one the 6.5 BS Tactical (Boondoggle Short obviously). It's loaded with a 130gr Berger AR Hybrid at 2.930"
(https://i.imgur.com/fRmU5Rt.jpg?1)
6.5x47 Lapua, 6.5 Creedmoor, 6.5 BS Tactical, 338 Boodoggle, 358 Boondoggle (200gr TTSX)
Yeah, that 358 version of the short action boondoggle sounds cool. Like a 350 Rem Mag on steroids.
Post by: hogslayer on June 19, 2018, 09:03:11 PM
Post by: b23 on June 19, 2018, 09:10:18 PM
Post by: yorketransport on June 19, 2018, 09:22:27 PM
Since the press is all warmed up.. how about the .416?
I'm digging the 6.5, but all the Instagram operators would whine as it would damage their A36..... oops AR500 targets.
Bad picture but here's a 416 Boondoggle next to the 358, should come in a little behind the 416 Taylor. I don't have any 416 bullets around to show a loaded round.
(https://i.imgur.com/Rb2ZPnE.jpg?1)
I'm more surprised you own a 6.5 creedmore
No Creedmoor, but I used the 6.5 Creedmoor brass to form 270 AR cases. :tup: I wouldn't slum it with the Creedmoor....
Ever thought of just necking up a 325 WSM to 338? Should give you about the same result but with a little longer neck.
I played with a 338/300 WSM for a while and it was pretty much the same performance that I'd get from this. I've always felt that the narrower Ruger case fed smoother through push feed actions than the WSM.
Post by: Biggerhammer on June 19, 2018, 10:12:02 PM
Post by: kselkhunter on June 19, 2018, 10:25:08 PM
Post by: yorketransport on June 19, 2018, 10:44:54 PM
Looks good with the acception of that crap blue tipped abomination stuffed in that case.
I’m short on 358 bullets, this is what you get. :chuckle:
What are you planning to do for dies? Custom? Or just neck sizing?
If I did the 358 I’d need to have custom dies made. For the 338, 30 and 6.5 versions you can use a set of Hornady RCM or PRC dies to seat and neck size/shoulder bump and a 375 Ruger die to size the web. I like to try and use readily available dies for all my wildcats to save the time and hassle of getting custom dies.
Post by: smdave on June 20, 2018, 12:51:02 AM
Post by: b23 on June 20, 2018, 08:08:25 AM
How would this compare to the 338 Federal
The 338 Federal has quite a bit smaller case capacity than what Yorke's creation has so it wouldn't really be a very close comparison.
Post by: yorketransport on June 20, 2018, 01:25:19 PM
How would this compare to the 338 Federal
This would be 350+ fps faster than the 338 Federal. I’ll get a picture of the two next to each other.
Post by: yorketransport on June 20, 2018, 08:15:27 PM
(https://i.imgur.com/797ZGN8.jpg?1)
Post by: kselkhunter on June 20, 2018, 09:59:38 PM
Post by: bullfisher on June 20, 2018, 10:56:49 PM