load workup for 300 RUM...

kaseyfied · #1 03-28-2011, 08:46 PM

hello,

I am now trying to develop a load for my custom 300 ultra mag rifle. wanting to get it out to around 1200 yrds. do alot of big game hunting. but Ihave never reloaded before. I have purchased 208 grain amax bullets for the data. any help would be great. I think I am going to go with reloader 22 for powder. thanks in advance myfriends. will be hunting deer and elk mostly thanks everyone

kasey field

Long Time Long Ranger · #2 03-28-2011, 09:58 PM

Your powder is to fast. You need to look more in the RE25, H1000, Retumbo, US 869 area or one of the slow vihtavouri powders. I shot a deer over 1000 yards this year with the 208 Amax at 3220 fps in front of H-870 powder.

The Amax bullets are to fragile for elk hunting except for the high shoulder shot. You could run into trouble there. The 200 accubond at .588 bc over 3200 fps is a better choice for elk.

freebird63 · #3 03-28-2011, 10:30 PM

Do me a favor and send me your email address, I have a ton of information I can send you. I have researched every bit of information I could find and have talked to shooters that are shooting the 300RUM out to 1000 yards to 1 mile.
What gun do you have???? What scope do you have. How long have you been reloading? I have helped many people develop loads for their 300RUM's
It is an awesome cartidge with lots of potential. What are you going to be hunting and what distances are you going to be shooting/hunting.

Chuck

lamiglas · #4 03-28-2011, 10:34 PM

We have a few of these and we have had great luck with the 200 grain accubonds and 90 to 91.5 of h 1000 and cc

i 250

backwoods83 · #5 03-28-2011, 11:23 PM

As I and several others have mentioned reloder powders are way to temp sensitive for that powerful of a round. Depending on seating depth I'd use 94-98grns of retumbo with fed 215s or cci 250s.

Sniper 865 · #6 03-29-2011, 12:43 AM

Quote:

Originally Posted by Long Time Long Ranger

Your powder is to fast. You need to look more in the RE25, H1000, Retumbo, US 869 area or one of the slow vihtavouri powders. I shot a deer over 1000 yards this year with the 208 Amax at 3220 fps in front of H-870 powder.

The Amax bullets are to fragile for elk hunting except for the high shoulder shot. You could run into trouble there. The 200 accubond at .588 bc over 3200 fps is a better choice for elk.

I have been shooting 100.5gn Retumbo behind 180gn Barnes tsx bullets for a
few years now and this load is super accurate and fast(3470fps) but expands primer pockets with the first loading. Pass throughs are the norm on elk out to 500yards and bullets recoverd from elk past that were 99% fired wieght. This load is hard to give up but it really isnt safe. Having said that, all other loads i have tried also expand primer pockets and are not nearly as accurate. Rl25 @ 89gns is cloose but still expands pockets, anyone out there got any sugestions as to what i can do.

MontanaRifleman · #7 03-29-2011, 01:07 AM

Quote:

Originally Posted by Sniper 865

I have been shooting 100.5gn Retumbo behind 180gn Barnes tsx bullets for a
few years now and this load is super accurate and fast(3470fps) but expands primer pockets with the first loading. Pass throughs are the norm on elk out to 500yards and bullets recoverd from elk past that were 99% fired wieght. This load is hard to give up but it really isnt safe. Having said that, all other loads i have tried also expand primer pockets and are not nearly as accurate. Rl25 @ 89gns is cloose but still expands pockets, anyone out there got any sugestions as to what i can do.

I've been shooting 180 E-Tips @ 3400 fps using 97.5 gr of Retumbo out of a Sendero. Primer pockets are holding well with this load. 98 gr gets me about 3440 with an occasional stif bolt and somewhat flatend 215 primers. 93.5 gr of Retumbo is pushing 210 Bergers @ 3150 without signs of excessive pressure.

-Mark