Reloading 458 scm with extreme bullets

[T.coates]

Im have a tough time finding load data that will,slow down my 458 under 1500fps so i can use theae 300gr extremes.

What is the fastest i can safely make these?
My goal is to slow them down within safe range and have gun cycle reliably while maintaing a 30-35gr charge.
These are plinkers not hunting rounds

[CodySPowell]

Im have a tough time finding load data that will,slow down my 458 under 1500fps so i can use theae 300gr extremes.

What is the fastest i can safely make these?
My goal is to slow them down within safe range and have gun cycle reliably while maintaing a 30-35gr charge.
These are plinkers not hunting rounds

I'm not overly familiar with 458 but I know the Xtremes can be pushed real hard. The 1500fps is a recommendation. A few guys here push them much further with no problems.
If you can, ask Keith Hodgkins. He's a 458 guy.

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[Wes Sage]

I talked with Keith, and he will comment later when he is free

[Rottieman33]

Im have a tough time finding load data that will,slow down my 458 under 1500fps so i can use theae 300gr extremes.

What is the fastest i can safely make these?
My goal is to slow them down within safe range and have gun cycle reliably while maintaing a 30-35gr charge.
These are plinkers not hunting rounds

Will be home in about an hour to help you

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[Rottieman33]

Ok what powder you going to use

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[Rottieman33]

.

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[T.coates]

Powder depended on what velocity i could run
Im fond if IMR powders. So was thinking the 4227,
Keepung,it at 30-35 grains is to,maximize how,many i can,make per lb

[Rottieman33]

These speeds are with Large pistol primers not magnums

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[T.coates]

Those for 300gr?

[Rottieman33]

Those for 300gr?

Yes

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