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New .338 lanches a 300gr Sierra MK at 3500fps?

 
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  #29  
Old 11-30-2013, 06:00 PM
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Re: New .338 lanches a 300gr Sierra MK at 3500fps?

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Originally Posted by Kiwi Greg View Post
I couldn't agree more from what I've seen with the 375s.

With new projectiles being developed, things are looking good for the .375
Amen brotha!!!
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  #30  
Old 11-30-2013, 07:25 PM
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Re: New .338 lanches a 300gr Sierra MK at 3500fps?

What new projectiles, or are we still talking only the monolithics we're already using? Is there any new conventional 375 bullet on the near horizon? I know Berger will do one one day...but what else is coming? A 400gn SMK would be nice, or a 350 to 400gn A-Max!
Greg
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  #31  
Old 11-30-2013, 07:35 PM
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Re: New .338 lanches a 300gr Sierra MK at 3500fps?

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Originally Posted by NZ Longranger View Post
What new projectiles, or are we still talking only the monolithics we're already using? Is there any new conventional 375 bullet on the near horizon? I know Berger will do one one day...but what else is coming? A 400gn SMK would be nice, or a 350 to 400gn A-Max!
Greg
New Monos

Yep I'm sure Berger will do one or two, one day..... like the 195s

An Amax would be great the .338, 285s are very nice
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  #32  
Old 11-30-2013, 07:43 PM
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Re: New .338 lanches a 300gr Sierra MK at 3500fps?

Quote:
Originally Posted by NZ Longranger View Post
What new projectiles, or are we still talking only the monolithics we're already using? Is there any new conventional 375 bullet on the near horizon? I know Berger will do one one day...but what else is coming? A 400gn SMK would be nice, or a 350 to 400gn A-Max!
Greg

I do not think the 375 cal needs 400 grains of bullet weight with the modern designs we have today. I would love to see Hornady go away from the plastic tip and step up to the aluminum tip like they do in the 50 cal A-Max. A 375 to 380 gr with a large tip, aggressive ogive and good boattail design would easily get into the .9 BC range I would think.

As far as berger, they have some 375 in the works, when they will be ready, your guess is as good as mine but they will be here someday.

Sierra really needs to get off their rears and start designing some new bullet designs. Not sure what it will take to get them off their butts and put a tip on an aggressively ogived bullet to get their BC up where they should be. Far to long they have been sitting around thinking that they have a huge share of the market and have no need to get back into the larger caliber long range bullets. I mean how long has the 300 gr SMK been with us unchanged. Its a great bullet, it could be much better. How long have we had the 240 gr SMK, its a dog ballistically.

Now I know what some of these companies will tell you because they have been telling me this excuse for many years, WE HAVE TO BUILD A BULLET THAT WILL STABILIZE WITH A STANDARD TWIST.......

A 1-10 twist bullet will EASILY stabilize any tipped 375 gr lead core/cup jacketed bullet.

I am not a fan of solids. Yes they are impressive ballistically but they have to be so perfectly matched to bore diameter that its a major chore to get the right combo in a functioning rifle. Yes it happens but I want a bullet that is consistant over a wider range of bore diameters which is what cup jacketed/lead core bullets give us.

Plus, they are better game bullets hands down.

Just my 2 penny's!!
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  #33  
Old 11-30-2013, 07:49 PM
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Re: New .338 lanches a 300gr Sierra MK at 3500fps?

What could one expect from an improved 375 RUM case with a 350-370 gr bullet or would it be better to start with a 378 Weatherby case. I'm just thinking what is possible without going all the way to the Cheytac case. As you know an RUM case would allow a M 700 action, is 3000 fps possible using an improved RUM case and a 350 gr bullet with a shorter bearing surface(Berger'ish)
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  #34  
Old 11-30-2013, 08:22 PM
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Re: New .338 lanches a 300gr Sierra MK at 3500fps?

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Originally Posted by Erik Kiser View Post
What could one expect from an improved 375 RUM case with a 350-370 gr bullet or would it be better to start with a 378 Weatherby case. I'm just thinking what is possible without going all the way to the Cheytac case. As you know an RUM case would allow a M 700 action, is 3000 fps possible using an improved RUM case and a 350 gr bullet with a shorter bearing surface(Berger'ish)
I got 2875-2900 with the 350SMK & 330 CE in a 28" Rem 700, 375 Rum imp so 3000fps may be possible with a longer barrel & shorter bearing surface ?

You could go 375 Lapua imp-375 AX etc
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  #35  
Old 11-30-2013, 09:01 PM
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Re: New .338 lanches a 300gr Sierra MK at 3500fps?

Sounds like if Berger would do 350 gr that 2900-2950 should be achievable with a 30" barrel. That would be a hammer and wouldn't be too hard to put together
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