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New .338 Lap Mag


capt561921

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Its a very easy calibre to load for, and most things seem to shoot well. I,m currently using a 250 grain scenar, and federal primers, with 95 grains of vhit 570. This shoots under 1/2" at 100 yards.

Its also good, from the limited tests i,ve ran, with the same powder, and scenar 300 grainers.

Vhit 165 is also good. I stick to vhit, because its cheaper, pound for pound, than hodgdons. Ronin on here has several good hodgdons loads.

If your up at warcop on saturday, you can have a poke with it.

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94.5g of H1000 gives me sub .5 MOA and 2900 fps

 

 

Will be trying some H4831SC tomorrow as I have only a 1lb of H100 left at the moment.

 

Time to fire up quickload, to get a substitute weight.

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I'll look later mate need to know bullet weight , oal( from tip of bullet to base if case) and seat depth, ( out at moment on phone tinternet)!!

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Rob

 

 

 

338's dont group.....................

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Not :rolleyes:

 

 

 

 

 

 

 

 

 

 

 

Been out today, slight L - R crosswind.

 

All targets shot at 100 mtrs.

 

Used my normal load of 94.5g H1000 (2900 fps) as "control" to make sure rifle and I were "on"

 

338250SMK945gH1000.jpg

 

Then shot another three at a different dot - yes there are three shots in this; B)

 

338screamer.jpg

 

 

Then tried a few different weights of H4831SC.

 

Found that I need more powder, didnt have time for extensive testing but here's the results

 

86g - 2759fps

 

33886gH4831sc250SMK.jpg

 

86.5g - 2805fps

 

338H4831SC865g250SMK.jpg

 

87g - 2827fps, I pulled the last shot......

 

338H4831SC87g250SMK.jpg

 

 

Looks like circa 88 grains of 4831SC will get me to 2900 fps easily.

 

 

This is where the sweet spot is for the 250g SMK's in my rifle :angry::D:D

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Just to add, the 250's were seated to SAAMI spec so they mag feed.

 

They are actually jumping about 050" to the lands, my chamber is Min SAAMI spec match job, the AI AWSM will have MAX SAAMI chamber, however I have about 400 pieces of once fired RUAG brass going if u are looking for brass for your new addition??

 

 

Been fired in an issue AWSM so should have no problem in yours.......

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Rob

 

 

 

338's dont group.....................

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Not :lol:

 

 

 

 

 

 

 

 

 

 

 

Been out today, slight L - R crosswind.

 

All targets shot at 100 mtrs.

 

Used my normal load of 94.5g H1000 (2900 fps) as "control" to make sure rifle and I were "on"

 

338250SMK945gH1000.jpg

 

Then shot another three at a different dot - yes there are three shots in this; B)

 

338screamer.jpg

 

 

Then tried a few different weights of H4831SC.

 

Found that I need more powder, didnt have time for extensive testing but here's the results

 

86g - 2759fps

 

33886gH4831sc250SMK.jpg

 

86.5g - 2805fps

 

338H4831SC865g250SMK.jpg

 

87g - 2827fps, I pulled the last shot......

 

338H4831SC87g250SMK.jpg

 

 

Looks like circa 88 grains of 4831SC will get me to 2900 fps easily.

 

 

This is where the sweet spot is for the 250g SMK's in my rifle :):o:D

 

Cheers,

 

So amazing groups what set is your .338 (barrel ect) and do you have any pic's of your rigs.

 

regards

 

Rob

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Rob

 

 

you will be able to caress it at Warcop this weekend and later in Powys in Nov :lol:

 

Taking these to both:

 

Surgeon XL 338 (barrel is a custom Pac Nor 9 twist)

 

_ASC0196.jpg

 

 

BAT repeater 6.5x47 (barrel is Lothar Walther 8 twist)

 

DSCN0824.jpg

 

They are as accurate as each other, however the 338 has the legs, usualy able to connect with a 4 inch plate at 800 mtrs with reasonable consistancy with it :)

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Rob

 

 

you will be able to caress it at Warcop this weekend and later in Powys in Nov :lol:

 

Taking these to both:

 

Surgeon XL 338 (barrel is a custom Pac Nor 9 twist)

 

_ASC0196.jpg

 

 

BAT repeater 6.5x47 (barrel is Lothar Walther 8 twist)

 

DSCN0824.jpg

 

They are as accurate as each other, however the 338 has the legs, usualy able to connect with a 4 inch plate at 800 mtrs with reasonable consistancy with it :)

 

Brill,

 

Cant wait.

 

How do you think the AI with 1 in 10 would do in .338 ?

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It will be fine with 250's, may not stabilise 300's.

 

 

DS1 (David) on here has extensive knowledge of AI AWSM and just recently sold his 338, he may have better info for your new addition than I, I know another chap with an AWSM who you will meet in Nov.

 

 

My own 338 is self built, to my spec, it works just fine :rolleyes:

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