270wsm/06/300wby range report
Lets start out by saying, this was my first reloads solo. My buddy has helped me a lot, and I finally feel comfy Doin everything on my own. All three rifles are rem 700's, in which all except the wby, has factory everything..not even lightened up triggers. The wby I have a 24" pacnor barrel with a break, floated and bedded. My goals were 3300 in wsm, 3300 in wby and 3000 in 06...with accuracy of course. I met all my needs..to say the least. Chronograph was a pact pro set at bout 8'..and it was bout 72 outside. All shot where at 105 yds.
I had some 168 tsx's loaded for 06 with a max charge of rl 19 that shot decent..but I wanted more speed. So I tried rl17 and 150ttsx. I started out formed win brass, fed 215 primer, and 56.5 gr of 17. It shot ok but I want an inch. I made three rounds of 56.5/57.5/58.5. As I increased the charge the groups shrunk. And the 58.5 3 shot group averaged 2998. As you can see is ok with me. Coal was 3.368.
300 wby. Same thing...three rounds in 1 gr increments starting with 85 gr rl22, with formed wby brass, fed 215, 168tsx, coal 3.675.same thing as I increased charge groups shrunk. I didn't even shoot the 88 gr cuz I reached my goal with 87 and the three shot group averaged 3330. No sticky bolt, primers were not flattened and didn't see and extractor marks.
270wsm. I wanted to try 130tsx but since I heard of the big bc drop, I loaded up some 129 lrx. I tried rl 17 and 22. Same thing again 3 loads, one gr increments, and as I increased charge groups shrunk. 17 shot about 1.5" with a flyer. I ended up sticking with 22. Virgin rem brass, 215, 67gr 22, coal 2.865 which is about as long as my mag box would let me seat. No sticky bolt, and primer looked ok. Ended up being an average of 3323.
I did after every shot wait 2 mins just to mitigate the excuse of the barrel being warm. Now the ol lady is pissed cuz I'm in the garage so much..
Using new 300 Weatherby Hornady brass, Sierra 180-Pro Hunter grain bullets, IMR-7828 powder, and CCI-250 Magnum primers, I started my quest at 82.0 grains of powder and 26" Barrel MK 5
The first load of 82.0 grains of IMR-7828 averaged 3149 fps, with a low of 3115 and a high of 3192much too much deviation to suit me, but approximating the Hornady factory velocity. The primer showed a slight crater but otherwise no extreme pressure signs.
A load of 83.0 grains IMR-7828 gave an average of 3174 with a low of 3161 and a high of 3191. I detected no difference in the appearance of the primers or cases.
A load of 84.0 grains of IMR-7828 yielded an average 3252 fps. That was more of a jump than I expected, but there were still no signs of excessive pressure and the primers looked just like they did with 82.0 grains.
Most authorities consider a load of 85 grains of IMR-7828 with a 180-grain bullet maximum in this cartridge. The Nosler Fifth Edition lists 84.5 grains as maximum at a velocity of 3185 feet per second. In my rifle, 85.0 grains still showed no excessive pressure and produced an average velocity of 3291 fps. Not only that, but the consistency of the loads seemed to be getting better as I went up. This load produced a spread of only 12 fps with a high of 3298 and a low of 3286. I was impressed.
Since there were no obvious over-pressure signs, I went to 86.0 grains of IMR-7828. This was the magic load, as far as my quest for 3300 feet per second in the Weatherby was concerned; 86.0 grains produced an average of 3330 fps with a high of 3356 and a low of 3307. Believe it or not, I detected no difference in the primers or cases from the first load of 82.0 grains. The extraction was still slick and easy, and case head expansion was well within acceptable limits. I suspect that I could go even higher, but I had proven what I had set out to prove.
My hunting load is 85.0 with the Sierra 180 Pro Hunter