try retumbo and h1000

Stay away from Remington brass for this cartridge.Use the Nosler brass.If you were living in Canada I would send you a box on the house.

I find the Nosler brass to be very soft, compared to the Remington Ultra-mag brass. About the only reason I'm using it is because I already have it. May as well use it for something.

RL25 with Rem brass works for me.
With 180gr bullets my ave was 3405fps 10 ft from the muzzle.
Why do folks keep saying it is little more than a Wby? Per my manuals that beats the Wby by about 10%. Zeroed at 300yds it's about 3 inches high at 175 and 7 inches low at 400.

quote:

Originally posted by Blacktailer:
RL25 with Rem brass works for me.
With 180gr bullets my ave was 3405fps 10 ft from the muzzle.
Why do folks keep saying it is little more than a Wby? Per my manuals that beats the Wby by about 10%. Zeroed at 300yds it's about 3 inches high at 175 and 7 inches low at 400.

What bullet did you end up using in yours? Been thinking to try the AB and TSX to start with.

I use a 200 grain accubond in my sako, for 2950fps. Great long range killer.

I've had several 300 RUMs. 1st one as soon as they came out. All were Model 700s and proved to be very accurate. I've taken moose, sheep, caribou, mule deer, antelope, and several big bull elk with this round. It flat out hammers game. My current 300 Rum wears a Hart barrel and shoots 1/2 inch groups with 180 Accubonds and RL-25.

Try the 300 Rum with 150 grain bullets 1/2 inch MOA. Shot a springbok at 700 yards and it dropped in its tracks...have a 6X24 Swarovski TDS on it. It's a BENNETT custom with a break. Speed kills. This caliber is a smoker.

quote:

Originally posted by IanD:

quote:

Originally posted by Blacktailer:
RL25 with Rem brass works for me.
With 180gr bullets my ave was 3405fps 10 ft from the muzzle.
Why do folks keep saying it is little more than a Wby? Per my manuals that beats the Wby by about 10%. Zeroed at 300yds it's about 3 inches high at 175 and 7 inches low at 400.

What bullet did you end up using in yours? Been thinking to try the AB and TSX to start with.

That load was developed with X bullets because the TSX were not available in 1991 when I bought that rifle. The TSX should work as well or better.

That is exactly what I'm thinking, BT. The 180 grain TTSX is going to be my first stop.

My 300 RUM is a Sako 75, 180 gr. Accu-bond 95 gr. Rl. 25 @ 3320 fps.

Do you notice any temp sensitivity with RL25?

Mike--

I have one of the SS Sako 75's in 300 RUM. Great shooter, and worth keeping an eye out for. The Sako, which I bought new, has a bit of freebore that I hadn't expected (nearly weatherby style). It is quite a fan of very slow powders, US869, RL50, and Retumbo are favorites. Getting book velocities has been easy.....at least with heavy bullets.

It's not a light rifle and still has quite a bit of recoil.....but it is quite a long range machine.

Cheers,

Dan

I used my Custom Sako 75 .300 RUM on an Australian cull hunt in August. It definitely wasn't an application that showcases the RUMs strengths and highlights its downsides.

Rapid fire heated it up to the point that it made me feel guilty. That by itself isn't going to bother the guy who's going to carry it for a week between shots. The recoil didn't matter to me, and although it has a brake it got taken off after the first shot. Trouble is, the under 300 yard shooting isn't something that made a RUM look good, or desireable or anything other than annoying. I will admit that it felt better carrying it on buffalo and scrub bull than the 30-06. Neither are regular buffalo medicine though.

What I couldn't get past was how ear splittingly loud it is. I've never had to hunt with ear muffs with a non-braked rifle before, but whenever a shot was taken without them it was regretted.

quote:

Originally posted by IanD:
Do you notice any temp sensitivity with RL25?

No but the temps around here are typically 60-100F so not real hot or real cold. The load has never shown any obvious signs of over pressure IN MY RIFLE. Just approach any max load in small increments with caution.
Dogleg,
That certainly was not the hunt for a RUM. The noise from mine hasn't seemed to be that bad since I took off the damned brake but I'm old and deaf.

ihave a sendero.man you guys sure got lucky with the speed your getting with 180 gr bullets. I tried rl25 and retumbo and could get no more than 3300. without a lot of press sign. went to 165 gr bullets and still could not get any speed or good accuracy neither weight shot good. went to rl 19 in desperation dad had some and with the 165 hornady gmx it shoots good and im getting 3450. what 3 grove nitrided barrels are you using and who makes them?

quote:

Dogleg,That certainly was not the hunt for a RUM. The noise from mine hasn't seemed to be that bad since I took off the damned brake but I'm old and deaf.

It wasn't the best fit, but did enable me to kill more animals with a .300 RUM in a few days than I might have otherwise shot with that caliber in many years if ever. I couldn't help concluding that one of my .300 Wins would have done the same job while being easier on the operator.

I see the .300 RUM at its best as a very long range caliber that crowd into Lapua territory while still being portable. Those 15 pound specialty rifles get annoying real fast.

quote:

Originally posted by IanD:
Do you notice any temp sensitivity with RL25?

Don't notice any.

I had a few model 700's and got a itch for something else but always went back to the 300 RUM I just love this caliber I always used 180 grain bullets(scirrocs,ttsx,partition,trophy tip,and currently accubond) from all of mine but been hearing great results about 200 grain accubonds.....

I've had 3 barrels in 300 RUM ranging in length from 25" to 28" A long barrel is a preferable with the 300 RUM

All have been VERY accurate, in particular with the 165-168-170 grain weight bullets, which is unusual for 300 magnums.

My favorite bullet in them for hunting is either the 170gr or 200gr Lapua Naturalis.

Best powders for the heavy bullets are either Retumbo or VN N570.

Rl-22 or RL-25 work well with the lighter bullets.