I make about 20 different types of lead bullets, I know how to make them, and even test them for hardness.
You are comparing a Lyman great plains to a HORNADY great plains.
The Lyman is a solid base design.
The Hornady is hollow base.
The Lyman has a base band of .499
The Hornady has a base band of .500
The Lyman has a top driving band diameter of .504
The Hornady has a top driving band diameter of .510
The only thing these bullets have in common is the name Great plains
I agree the Hornady great plains 410 gr is a fantastic bullet. They are a solid nose HOLLOW base design that is accurate and effective on game. I have shot 3 muledeer with the 410's
Now for the guns I used them in.
I used TC Renegades with Green Mountain Stainless steel 1-28 twist barrels.
The hornady bullets shoot very well out of this gun.
The Lyman Great plains bullets shoot very poor.
Notice the Hornady is a 100 yard target and the Lyman is a 50 yard target. I started to make some 500 S&W bullets. I paper patch these bullets and they shoot VERY well.
While I might not know a lot of things in this world, I do know how to make, and shoot bullets. I also know that Lyman great plains bullets are NOT as good as a Hornady great plains. Ron
Originally Posted by
driftrider
Maybe you weren't molding them right.
The Hornady GP conicals have always shown excellent accuracy in all my guns. I suppose if you're using a RB twist, the long bullet would probably not stabilize well and show accuracy problems, but in a 1:28" or faster twist, they are great. They hit hard too.
Mike