Tossing around a few ideas about building a big 30.
What twist are are you using for the 240SMK and how fast are you pushing it?
What twist are are you using for the 240SMK and how fast are you pushing it?
How fast do you push the 240SMKs?
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Re: How fast do you push the 240SMKs?
From a 30-06 1-10" twist, 2450. I used H1000. That's as I remember it, I don't have that 30-06 anymore.
You shouldn't have any problem getting to 2600 or better with a .300 WM. You could at least get that good with .300 WSM
From a 30-06 1-10" twist, 2450. I used H1000. That's as I remember it, I don't have that 30-06 anymore.
You shouldn't have any problem getting to 2600 or better with a .300 WM. You could at least get that good with .300 WSM
Re: How fast do you push the 240SMKs?
Thanks sandwarrior.
I'm leaning towards a 300LM.
I have shot them out of my 8tw 300 Whisper, but I don't think they would stay together going 3,000-3,100FPS out of a 8tw.
Thanks sandwarrior.
I'm leaning towards a 300LM.
I have shot them out of my 8tw 300 Whisper, but I don't think they would stay together going 3,000-3,100FPS out of a 8tw.
Re: How fast do you push the 240SMKs?
expect 2800 then.
<span style="color: #3333FF">Added:
There should be no problem staying together @ 3000 from a 1-8" It takes a lot of friction to heat up the jacket to help bullets come apart in flight. You won't see them start to come apart until above 3500. Unless you have a long barrel then it could be as low as 3300.</span>
expect 2800 then.
<span style="color: #3333FF">Added:
There should be no problem staying together @ 3000 from a 1-8" It takes a lot of friction to heat up the jacket to help bullets come apart in flight. You won't see them start to come apart until above 3500. Unless you have a long barrel then it could be as low as 3300.</span>
Re: How fast do you push the 240SMKs?
I'm not looking to push them over 3k. Was hoping they would be faster than 2,800 with 100% case capacity out of a 26-28 inch barrel, but I don't have Quickload to work up any numbers.
Plus I didn't know how thick the jackets were on them or if they had the same problems the old 30cal 250SMKs did. The old 250SMKs didn't fly well when pushed hard.
Plans are for a switch barrel rig, 338LM and 300LM.
I'm not looking to push them over 3k. Was hoping they would be faster than 2,800 with 100% case capacity out of a 26-28 inch barrel, but I don't have Quickload to work up any numbers.
Plus I didn't know how thick the jackets were on them or if they had the same problems the old 30cal 250SMKs did. The old 250SMKs didn't fly well when pushed hard.
Plans are for a switch barrel rig, 338LM and 300LM.
Re: How fast do you push the 240SMKs?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: samson</div><div class="ubbcode-body">Having a 300Lapua improved built now w/1-10tw that will shoot the 240's just fine. </div></div>
What length barrel are you using and what are you planning for velocities?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: samson</div><div class="ubbcode-body">Having a 300Lapua improved built now w/1-10tw that will shoot the 240's just fine. </div></div>
What length barrel are you using and what are you planning for velocities?
Re: How fast do you push the 240SMKs?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: samson</div><div class="ubbcode-body">Will be a 28in tube and 3200 give or take </div></div>
Wow. Thats moving. I may stick to 26 then. My goal is to just break the 3k mark.
Are you doing a standard necked down 338LM or the improved version?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: samson</div><div class="ubbcode-body">Will be a 28in tube and 3200 give or take </div></div>
Wow. Thats moving. I may stick to 26 then. My goal is to just break the 3k mark.
Are you doing a standard necked down 338LM or the improved version?
