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Help on loading 30/338 Lapua 35degree Improved

 
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  #8  
Old 04-14-2010, 02:25 PM
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Re: Help on loading 30/338 Lapua 35degree Improved

Im considering building a 300 lapua improved. Im told that I should be able to send 210 smks downrange at 3400 fps plus. I know a guy that says he is sending them at 3460 fps, and keeping them in 1/2 moa at a 1000. Is this believable? I have not seen it with my own eyes. You are aproaching 3000 with the 240s, how far off of max would guess you are? I would love to here more results when you get them.
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  #9  
Old 04-14-2010, 02:27 PM
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Re: Help on loading 30/338 Lapua 35degree Improved

i forgot to mention, he said he's doing it with a 27" barrel
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  #10  
Old 04-14-2010, 09:50 PM
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Re: Help on loading 30/338 Lapua 35degree Improved

I don't know why I'm listed as a guest in the original posting of this thread but I am the one who posted about the 30/338 LM Imp.
I'm getting 3250 fps with a 210 JLK using 93grs of Retumbo out of a 31" Lilja 3 groove barrel, this is a max load in my rifle.
I'm using a Sako M995 action from a factory TRG-S hunting rifle that was originally chambered in
338 LM.
Maybe in stouter custom action I could go higher but 3460 fps seems awful fast to me, maybe Kirby will chime in as he has a 30 cal cartridge that is a much improved version of the Lapua case.
As far as .5 moa at 1000yds that is very believable, been there, done that.

Wayne aka WAMBO
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  #11  
Old 04-14-2010, 11:24 PM
TH TH is offline
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Re: Help on loading 30/338 Lapua 35degree Improved

I shoot 86 grains of H-1000 at 3050 with a 240 smk and a 30 inch barrel. This is a max load in my gun. I also shoot a custom action (bat).

I think its possible to get 3300 fps with the 210 berger out of a 27 inch barrel but not 3460. Its just not going to be possible in every rifle build. I shoot 88grns of H-1000 at 3308 fps.
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  #12  
Old 04-15-2010, 11:33 AM
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Re: Help on loading 30/338 Lapua 35degree Improved

jessej

Those velocities are very obtainable in the barrel lengths you mention.

By the load data Wambo and TH are posting, I'm guessing those case designs kept the shoulder angle/body taper about the same as the SAAMI case.

The Improved designs, like Kirby's and the 30-338 Lapua that JE Custom built me, add quite a bit of capacity, about another 10-12 grains, and the load data reflects it.

103 grains of Retumbo is where I settled on out of 26" barrel at 3280 fps with a 210 VLD. It's seen well over 3400 fps with no pressure signs, but found a great big accuracy node at this velocity level, and it had all the performance I needed, so that's where it's at for now.

Really need to look at the reamer print to determine case volume, the bullet the chamber was throated for, and obviously barrel length (which you already are) to make an apples to apples comparison.
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  #13  
Old 04-15-2010, 04:12 PM
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Re: Help on loading 30/338 Lapua 35degree Improved

Thanks for the info, think im going with a 27" barrel. My wants are to have a easily carried rifle with velocities fast enough to shoot 0-300 yrds with no compensation, and acurate enough to dependably hit vitals on whitetail, muleys and antelope at 1000 yrds with enough energy to produce one shot kills. Thinking of topping it with a 5-22 nightforce. Currently using a 6.5-20 mark4 leupold. In your opinion, is the nightforce a better scope?
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  #14  
Old 04-15-2010, 06:07 PM
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Re: Help on loading 30/338 Lapua 35degree Improved

Jesse

Good that you have outlined your goals upfront, and quantified them.

Another route to think about is the 300 Win. I almost did what Jeff did at the thread below. This is a fantastic blueprint for 1000 yd deer/antelope carry rifle.
My New 300 Win Build

That platform will have much more barrel life, less recoil, and will bypass the cost/headaches of fireforming, custom dies, or purchasing your own reamer. RWS and Lapua brass can be found for the 300 Win, and a 100 pieces of that would last you at least a barrel, maybe two. Off the shelf Redding Competition seater dies, and plenty of 300 Win reamers around so you could find one that matched your bullet/working mag length without too much looking.

Of course the 30-338 Lapua offers about the top level performance you can get in a thirty as well.....

I shoot both the NXS 5.5x22 and the Mark 4 your shooting...and I will be in the minority here....and for a LRH hunting application you're speaking of they are equals IMO. If you added another 200 to 400 yds to your range, then I might give a edge to the NF. They both have box tested on different rifles for me. They both offer the necessary clarity for LR engagments. They both have great warranties. The Mark 4 can save you 1/2 lb. The NF does have a more positive turret and better reticle choices. I'd decide if 1/2 lb is worth it to you. They both have proven very reliable to me. I've taken the horse ejection express with a Mark 4, and the subsequent 50' down the mountain roll with a Mark 4. The tumble cracked a factory sendero stock, but the scope/rifle POI didn't shift. The NF has passed multiple box tests for me though...and the positive turret the NF have can't be beat.

In summary...They're both great scopes. My advice would be to decide if you'd rather have the 1/2 lb in your optic, or bump up one contour on your barrel and have the 1/2 lb in your barrel. If you needed to shoot past 1200 to 1400 yds, then you're talking a heavier rifle overall, and likely need more MOA...the NF would get the edge from me.

Just my opinion. All subsequent responders....please be nice!
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