Looking for assistance. Load Data, 300 Win Mag, 215 Berger, Retumbo

[trout004]

Hello LRH Friends,

I am helping a friend develop a load for a Seekins PH2, 300 WM with Retumbo and Berger hybrid 215's. We are starting off with new ADG brass and fed 215 primers.

I know that H1000 might be the easiest button to push for this bullet/cartridge combo, but my friend has a good amount of Retumbo on hand so we are going to try that first.

The data out there seems pretty limited with Retumbo. Can someone please provide min and max charge weight data for this and share their experience with Retumbo and this combo? (PS: I have quite a few years of reloading experience and I completely understand that starting low and working high is recommended to ensure that the shooter leaves the range with eyes, fingers, and a barrel that doesn't look like a peeled banana.)

Thanks for the help in advance!

 

[FEENIX]

Hello LRH Friends,

I am helping a friend develop a load for a Seekins PH2, 300 WM with Retumbo and Berger hybrid 215's. We are starting off with new ADG brass and fed 215 primers.

I know that H1000 might be the easiest button to push for this bullet/cartridge combo, but my friend has a good amount of Retumbo on hand so we are going to try that first.

The data out there seems pretty limited with Retumbo. Can someone please provide min and max charge weight data for this and share their experience with Retumbo and this combo? (PS: I have quite a few years of reloading experience and I completely understand that starting low and working high is recommended to ensure that the shooter leaves the range with eyes, fingers, and a barrel that doesn't look like a peeled banana.)

Thanks for the help in advance!

Contact Berger Tech Support for their latest recommendations.

 

[lancetkenyon]

Hodgdon book doesn't have that exact combo, but here is what it says (Win brass and Win LRM primer):

208 ELD-M 74.5 to 81.0 (C)
220 Sierra HPBT 73.0 to 80.0 (C)
230 Berger OTM 71.6 to 77.0 (C)

 

[trout004]

Contact Berger Tech Support for their latest recommendations.

Can do. Thanks, Feenix.

 

[trout004]

Hodgdon book doesn't have that exact combo, but here is what it says (Win brass and Win LRM primer):

208 ELD-M 74.5 to 81.0 (C)
220 Sierra HPBT 73.0 to 80.0 (C)
230 Berger OTM 71.6 to 77.0 (C)

Thanks!

 

[FireFlyFishing]

 

[trout004]

Phil from Capstone already emailed me back! It was a 5 minute turn around. He supplied the same page that FireFlyFishing posted and the attached data… in case anyone else is interested:

 

[Brathany]

I've found their charges really conservative.

 

[lancetkenyon]

Lawyer loads. But good information. I am usually in the 75.5 to 77.0 range with H1000.