Retumbo Powder

Doublejs · Posted: Sun Dec 02, 2007 8:38 pm Post subject: Retumbo Powder

Has anyone used Retumbo powder and have you had success with it?

I have heard that it is an awesome powder for magnum cartridges.

I am going to try it for my 338 RUM.

Pitt55 · Posted: Mon Dec 03, 2007 12:05 am Post subject: Re: Retumbo Powder

I have had very good results with Retumbo in a 300 RUM. 180 gr. slug at 3338 ft/sec. This is thru a Browning A bolt with 26" barrel. I think it's worth a try. Good luck
Don

Coyote_Hunter_ · Posted: Mon Dec 03, 2007 10:04 pm Post subject: Re: Retumbo Powder

Tried it in a couple cartridges. I think its too slow for anything but the largest cases. I got better velocityies with other powders.

Doublejs · Posted: Tue Dec 04, 2007 5:39 pm Post subject: Re: Retumbo Powder

Coyote_Hunter,

Were any of the cartridges magnums?

I am planning on using it for my 338 RUM and possibly 300 WBY Mag.

Coyote_Hunter_ · Posted: Tue Dec 04, 2007 10:13 pm Post subject: Re: Retumbo Powder

Yes, 7mm RM/140g TSX and .300WM/180g TSX.

I think you'll be fine with the RUM and WBY, especially if the barrels are over 24".

Northern Canuck · Posted: Sun Dec 09, 2007 1:39 pm Post subject: Re: Retumbo Powder

Works good in my 300RUM. 175 and 180 gn bullets. Under 1 inch which I consider good. If I had one thing bad to say about it, it would be that it does not feed through the measurer as nice as ball powders.
Northern Canuck

bradking1 · Member Joined: Mar 03, 2005 Posts: 53

i have used RETUMBO in 7mm rem's, 7mm STW, 257 wby, and 25-06...all have been wonderful performers. i think it is a great and stable powder...should work great on any overbore cartridge and it also keeps your pressures lower than other powders.

just my .02

Deleted_User_2665 · Super Member Joined: May 06, 2006 Posts: 380

Retumbo absolutely rocks in the 300 RUM with 180 X's................

Dirt · Posted: Sun May 24, 2009 3:43 pm Post subject: Re: Retumbo Powder

I`m loading 95 gr of retumbo in my .338 RUM with 250gr Sierra match king`s and getting sub MOA.