300 Whisper

[Retooferab]

Anyone have any subsonic load data for a 300Whisper using 220gn SMK and AA#9

 

[Zak Smith]

I use H110 or N110, don't have any data for #9, sorry.

 

[NCsmitty]

Here's a pdf file that I found from a Sierra manual. Quite a lot of different loads, including the one that you mentioned.

http://listmequick.com/300/Sierra300whisper.pdf



NCsmitty

 

[Retooferab]

NC, thanks for the info.

Zak, how much powder are you using, and does it cycle an ar? I am patiently waiting on my tax stamp to come back so I can pick up the 30P-1 that I bought from you!

 

[Zak Smith]

I load for a 10" Noveske .300 Fireball barrel, using converted LC brass. With a 240gr SMK, I use 9.1gr H110. for a 210gr VLD (Berger), I use 8.8gr H110. Both of these will cycle the action and lock the bolt back, although it is more marginal with the 240's. I cut off a couple coils of the op spring. Also I do use a slightly lighter bolt carrier.