2400 has always done better for me with cast bullets in the 308w accuracy wise compared to 4227. Burned thru #4 of 4227 trying several different cast bullets and never did get the results that 2400 delivers.
Not hand picked/cherry picked target. Nothing more than the target used that day testing bullets/loads. A 10-shot group @ 100yds (moa) using cast bullets (lee 160-2r tl) bullet with home made aluminum gas checks that was pc'd and then lubed with 45/45/10.
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Same bullet with h335, 2 moa/2" @100yds is childs play with a 308w and cast bullets. The 308w I'm using will easily do 2moa or less when pushing those bullets 2600fps+ with h335.
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Cast bullets with bore riding noses or long pointed noses tend to have issues when being driven/pushed too hard. A Cramer bullet that is a good example of this. I like the cramer bullet design better than the lyman 311334/311335/311314 bullets, the cramer has a shorter stronger nose. Cast from a 2-cavity mold 1 is a sp the other a hp. Same bullet/bullet base/bullet body, just different noses.
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Start pushing those bullets over 2400fps and the sp bullet design starts to fail.
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The issue with bore riding nosed bullets is they tend to strip out easily which ='s low pressure/low velocity unless they are cast from rock hard alloys. But too hard of an alloy can be just as bad, it all depends on the bullet's design. Made a couple of different bump dies to "bump" the bullets noses to fit the leade of my 308w bbl.Thee bottom bullet has an extreme bump to it but it has 60% more of it's nose engaging the rifling's when the bolt closes. That's why I still use a Egan bump die and 2 different bump dies for some of the bullets I cast and pc.
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Some hp's I cast/shoot in the 308w, the bump die that bumped the nose of that bullet pictured above was designed to bump a "Ness" hp bullet I cast so that the long hp of that bullet (top right) matches the leade of the 308w bbl and has land marks/full land engagement like the bullet pictured above.
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