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Best copper or bronze mono-metal bullet for expansion?

Running the numbers through the Berger Twist calculator the 240 is marginally stable at sea level with an 1-8" twist.
It's 2.037" long, the 230 is only 1.866" long and is stabilized with an 1-8".
 
fordy said:
Gday memtb
Your " brain stormed "is basically why I have trouble pulling you apart On your choices
Yes "lethality factor " is covering bases in my world even when things go bad with your pill of choice it kills

To give you a great example on that on my last lot of bovine tests I did on a cull
Had numerous 6.5 pencils ( multiple brands ) & unless the pill itself tumbled the killing efficiency was extremely poor moved to the 375 cal ( 1 brand ) & when it penciled killing efficiency was still poor imo but a hell of a lot better & id have to look up specific times but it's a lot
Now the 6.5 tumbling pills sometimes killed fairly well but erratic it was & eventually was the same as I've observed numerous times before & that is a tumbling pill will let you down more than a pill that works as designed
Really another subject for another day but a interesting one none the less

Keep on your " narrow minded" view 🤣as it gives us all a reality check of the basics of killing efficiency to cover those bases

Cheers
Click to expand...
Tumbling pills,
Fordy,have you ever tried Fort Scott muntions TUI's? Designed by Federal in the 60's to kill beyond shooting through door post and windshields on vehicles. VERY,very accurate in multiple 6mm's.
Needle sharp point,you can not carry in pocket. It becomes candie cane shape at 400m same as it did at 100yds in sand berms.
Shot a nice Kansas buck,excactly 300 yards with their 243win 90 gr,tiny hole in,mush in broiler room,took a rib out,out hole size of pop can,then lop an inch branch of cedar tree 20 yards behind it,but a good 10' right of deer.Never tried it again,something about it.
 
FEENIX said:
The 1:6" or faster twist rate recommendation might be a typo; perhaps they meant 1:8" or faster. Just like the 230s (https://cuttingedgebullets.com/prod...ollow-point-50ct?_pos=32&_fid=a0b72cf05&_ss=c). Have you asked CEB directly? @Samantha-CEB.
Click to expand...
Here's what I got from CEB this AM.
IMG_2225.jpeg
 
It's definitely not a typo. The 240gn CE is huge, and how long it loads when you don't put the band in the neck is a bit crazy. I have a mock up of a 30-338 Lapua with one in it somewhere to show it against a 245 Berger, but I plan on using them in 30 XC.
 
Ha no it wasn't all at once, nor at today's prices. I've been stockpiling for years, mainly tacking on to backorders of 400gn 375 Lazers. Those things are some of the most popular ELR bullets made, when you can get those you get all you can. I've waffled over my Mega-30 so many times I have stashes of everything for it. I finally decided to put the 30-338 LIMP into an 8 twist HV to shoot the 230gn CEs, and saved the big 6 twist tube for the 30XC. Part of me still wants to size down Cheytac brass and put the tube on a Noreen single shot action. 😈 But Kirby has been there, done that, and apparently it wasn't all it was cracked up to be.

CE is a great company to work with, Samantha is always fantastic when you call.
 
The 240gr CEB Lazer can be stabilized with a 1:7" twist barrel on Berger's Twist Rate Stability Calculator. Should I have gotten my barrel in a 1:7" twist instead of 1:8" ? 1:7" twist also stabilizes the Berger 245gr Elite Hunter.

Here's the results for the 240gr CEB Lazer in a 1:7" twist. The 240gr Lazer needs a stability factor of at least 1.5...

240gr CEB Lazer: 2600 fps = SG 1.57
240gr CEB Lazer: 2800 fps = SG 1.61
240gr CEB Lazer: 3000 fps = SG 1.65
240gr CEB Lazer: 3200 fps = SG 1.69

All the above: "Your bullet is STABLE. Your bullet is flying with full stability. You can expect good groups and your BC is optimized."

What are the positives and negatives with a 1:7" vs the 1:8" twist barrel in 300 RUM other than shooting heavier/longer mono's?
 
Arken7mm said:
The 240gr CEB Lazer can be stabilized with a 1:7" twist barrel on Berger's Twist Rate Stability Calculator. Should I have gotten my barrel in a 1:7" twist instead of 1:8" ? 1:7" twist also stabilizes the Berger 245gr Elite Hunter.

Here's the results for the 240gr CEB Lazer in a 1:7" twist. The 240gr Lazer needs a stability factor of at least 1.5...

240gr CEB Lazer: 2600 fps = SG 1.57
240gr CEB Lazer: 2800 fps = SG 1.61
240gr CEB Lazer: 3000 fps = SG 1.65
240gr CEB Lazer: 3200 fps = SG 1.69

What are the positives and negatives with a 1:7" vs the 1:8" twist barrel in 300 RUM other than shooting heavier/longer mono's?
Click to expand...
Didn't you see the response above from CEB? They said you need a 6twist. Listen to the pros who design and make the bullet and have tested them!! Further more why do you think you need the biggest mono available? Did you read the link I provided from CEB? Also that bullet is extremely long and going to take up a crap ton of room in your case and reduce your powder capacity. Think lighter weight and faster MV, JMHO. Bigger doesn't mean better unless you can push them fast enough.
 
Last edited:
JAYgs8163 said:
Didn't you see the response above from CEB? They said you need a 6twist. Listen to the pros who design and make the bullet and have tested them!! Further more why do you think you need the biggest mono available? Did you read the link I provided from CEB? Also that bullet is extremely long and going to take up a crap ton of room in your case and reduce your powder capacity. Think lighter weight and faster MV, JMHO. Bigger doesn't mean better unless you can push them fast enough.
Click to expand...
Yes, I did read the response from CEB. But, I am curious as to why the data from Berger's Twist Rate Stability Calculator is at odds with the views from CEB's staff.
 
See this thread about running the 245 Berger and the speed being attained. This is a shorter bullet than the CEB also. You will have less powder capacity using the CEB and will be lucky to duplicate the 2845 these guys are getting with the 245 EH.

www.longrangehunting.com

300 RUM 245 Grain Berger H1000 Load Data

Does anyone have any load recipes that have been working well in the combination of powder and bullet that I have listed in the title? I’m about to start working with a new custom I just got and wanted to see if anyone else has been having any success with the H1000. That is all I could get my...
www.longrangehunting.com www.longrangehunting.com
 

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