I have a Summit press, but haven't set it up as yet. So cannot help you here. As recommended above by Guy, contact RCBS to discuss the issue.
I hope to once I get the new addition built and have the space to set up my reloading bench!
I was surprised when I contacted Federal's Custom Ammunition...
Sorry, I only used 160 gr AccuBonds and 165 gr SGKs (Federal Premium ammunition) in the 7mm Rem Mag. Both worked very well.
As I have chosen to use the 160 gr bullets in my 7MM STW, I am going to use the 150 gr Ballistic Tips and AccuBonds in my 280 Rem.
QuickLoad shows that I should be able to...
Even if you aren't after your buffalo, it will still give you some great field experience with it on your plains game safari, and that would be a great primer for the next one where you do plan to chase Black Death!
As a camp gun, the 300 gr might be more penetration than you need...but if it is nasty, bad tempered and has a desire to claw, bite, or scratch it wouldn't be a bad choice...and definitely have more "Smack"! Would work great as a truck gun load for a quick shot on a bear, elk or moose.
The 240...
Don't recall the Partition velocity for guaranteed expansion off the top of my mind...but want to say it is in the 1900 fps range.
You didn't specify your barrel length. 22"?
Nosler's data is for a 24" barrel, and shows that you can get 3300+fps with Big Game, W760 and H414 with the 100 gr...
While it may have had some issues to start with, I think Ruger did a good job for you to rectify those issue; I would shoot it and see what you think before you kick it down the road. It could prove to be a gem you'll want to keep!
There are those animals that just don't follow the script and can prove to be a humbling experience!
Sounds like your ostrich proved to be one of these.
At least you scratched that one of the list.
Caribou are not known to be tough to kill, and yet my first bull at 100 yards soaked up 5 lethal...
A BLR in 257 Roberts is on my Bucket List!
There was one listed for sale a little while ago here in Canada, but they had improved it...and I would prefer an original.
I have always enjoyed playing with various cartridges in order to learn more about this past time, gain real world experience with each, for accuracy and on-game performance, and learning more about what each rifle prefers in terms of bullets, powder, primers, brass, and seating length. Just...
Nice group and good velocity!
Makes one wonder why we need a 6.5 PRC when one can get 2900+ fps out of the Swede with 140 gr class bullets in a modern action, with approx. 10% less powder. 🤔
But that wouldn't sell new rifles with faster twists and ammo with higher BC bullets! ;)
I just bought 4 boxes of 115 gr Partitions for the 257 Roberts to try in case I can't fine tune a load I am happy with for the 115 gr BT, due to the short magazine box of the Sako 591 action.