WSM Loads
 

I am reloading my 7mm WSM and I am using Retumbo powder for the first time. Going by the recommended loads from Hodgdon for a 162g bullet (66g to max of 70.5g), and I am using 68g, itfills the case to the shoulder. When I try to place a Hornaday 162g into the filled case, I have to force the bullet into the powder with a crunching sound,leaving no space at all. I have never had a powder do this. Is this powder designedto dothis?I have never had a case filled with no airspace and am concerned about pressures. Anyone else have experience with this?

RE: WSM Loads
 

I’ve had the same experience with my 7 mm-08 and it hasn’t given me any problems for MY rifle. If I’m not mistaken it’s called a compressed load, but I have been wrong before...

RE: WSM Loads
 

Yep, definately compressed. Retumbo is really not a great powder for the WSM line, as I found out with 300WSM. It is rather large for its weight. RL22 would suit your needs alot more. Or even 4831sc.

You can get a longer drop tube to help settle it down some. Believe it or not, you can fit an extra 2 gr in sometimes.

I know I used Retumbo for RUM and it was such a slow powder, I had to put 102gr in to reach the velocity of a 96gr RL25 load. And RL25 is very slow.

RE: WSM Loads
 

What opinions do ya'll have then, of the MagPro powder?

RE: WSM Loads
 

Can't say I ever used any of thier powders. I have tried RL22, Hodgdon 4831sc, H1000, IMR7828, IMR4350. 4831sc seemed best suited.

RE: WSM Loads
 

Yup, I've used H4350 for the past year, but wanted to try one of the powders touted as "made for the magnums" and see if there was any appreciable difference. The H4350 has given me great performance.

RE: WSM Loads
 

Retumbo was made for the RUM's and cases able to carry more than 90gr of powder

RE: WSM Loads
 

Got to go along with BC on this one. Retumbo is similar to RL25-very good powder for the UM's, but not the WSM's. I also agree with his choice of RL22. I also like 4831 in my 300 WSM with a 165 Grain Nosler BT. Tom.

RE: WSM Loads
 

I use retumbo in my 7mm saum and 175 gr. bullets with excellent results. Yes it's a compressed load too.

RE: WSM Loads
 

I have been using RL-19 for 3 years noe with Hornady 139 gr. for 3300 and also us it in 160gf partition with tack drivng results and would not think of using any other powder. dime covers 3 shot group and i60 gr. partation 3/4 for 160. Try it you will like in Model 70 winch.

RE: WSM Loads
 

I reloaded my .270 WSM with IMR4831 with excellent results. It shot sub MOA groups from 65 to 66.5 grains of powder. I loaded 1/2 grain increments

I also use the Retumbo for my 7mmRUM, 97.5 grains shoots well. AR25 produced the highest velocity and MagPro produced the lowest of the three powders I tested. I ended up going with the Retumbo and a Barnes TSX in 140 gr. bullet.

RE: WSM Loads
 

I use magpro almost exclusively and it is really accurate out of my 7mm WSM. I cant really speak for the velocity of it just yet. But when I tried H4350 is didnt produce groups worth a dern

RE: WSM Loads
 

H-4350....I've either tried or had a friend that tried just about everything that should work in 300 WSM's, 300 SAUM's, 7mm WSM's and 7mm SAUM's and nothing works better than H-4350, save yourself some time and money and just head in that direction..also fuel it with Remington 9 1/2 mag primers..hard to beat..

RE: WSM Loads
 

I believe Retumbo as well as RL25 was created for the Ultra Mag's, not the Short Mag's. IMO it is too slow for the Short Mag's. If I were you I would try RL 22, or 4831. Again IMO, the tradtional good powder's for the Standard Winchester Magnum's will perform well in the Short Mags. Tom.