Bought some Retumbo Monday and some RL-25 earlier today.
I wasn't impressed w/Retumbo's numbers so I started with the RL-25
From using the RSI pressure trace I'm pretty confident of recognizing the pressure sign from case extraction. I set up the chrono and started shooting.
I used the same two cases for this whole deal for analness.
RL-25, Sierra 250 Game Kings, seated to 3.041 base to ogive(if that'w what you call where the bullet is 0.338 diameter). Federal 215 Primers and neck sized cases.
90gr - 2822
91gr - 2883
92gr - 2902
93gr - 2949
Here's where I began to think that 3000 fps was achieveable.
93.5gr - 2977
94gr - 2983
94.5 - 3009
94.5 - 2993
94.5 - 2995
OK, now I'm comfy w/the velocity. Just beginning to see/feel/sense pressure signs in heat of day w/cartridges and rifle at afternoon temperatures.
The group looked prommising
94.5 -
I have a lot of seating depth to work with. The bullet base is at the base of the neck. The powder level is at the base of the shoulder.
I'll hook up the RSI and do further testing but it shouldn't need to be much.
Besides the average velocity of 2999 FPS there was a spread of +10 and -9 from the average which is much better than I was able to achieve with the Win Mag.
Also, after a scope adjustment
the last two shots went into 0.55" @ 200.
Tomorrow well see if this is a fluke or not but I'll grin myself to sleep tonight.