327 federal heavy bullets

[cwlongshot]

I like this powder. I wish more testing was done and there was more data.

Its the best 300 BO powder for <150g for me. 1680 is best >150.

Kinda cold for TX no?

Thanks for posting!!

CW

[megasupermagnum]

Warning, the following is not to be consider load data.

In 327 federal, I brought out the 148 grain Accurate 31-148CG today, cast as a solid, not a hollow point. Again I was using the CCI 550 primer. OAL was 1.595".

300-MP:

11.5 gr- 1106 fps

12.0 gr- 1175 fps

12.5 gr- 1229 fps

12.8 gr- 1266 fps

H110:

11.5 gr- 1155 fps

12.0 gr- 1200 fps

12.5 gr- 1261 fps

12.8 gr- 1292 fps

So in this instance we see H110 outperform 300-MP. Both in speed, as well as velocity spreads. I stopped at 12.8 grains, as that was about all that could fit, and was well compressed. At the max load, 300-MP had an ES of 93 fps, and H110 an ES of 19 fps. I did not test accuracy. No load showed any pressure signs, all cases fell right out of the cylinders.


So moving back to 357 magnum, I tried the Federal 100 standard primer with 300-MP. This time I was using the 175 grain Keith bullet at an OAL of 1.650".

17.0 gr- 1215 fps

17.5 gr- 1239 fps

18.0 gr- 1297 fps

18.4 gr- 1353 fps

Certainly no plateau this time. Still not quite the velocity I was hoping for, but not bad. Again the ES's were higher than I like 70 to as high as 100 fps. So it seems the standard primer did not help. For comparison I shot a load I found in one of my old load notes. 15.7 gr H110 went 1201 fps. On another day I shot my old standard load of 10 grains Bluedot with this bullet for 1220 fps, which is normal. Maybe I have a slow lot of H110, and I can certainly work up higher than 15.7 gr. I had that noted as an accurate load.


So it seems that 300-MP is not the speed demon that some have found it. I've still got a 137 grain bullet to try it with in 327 federal, as well as a 330 grain in 44 magnum. I see nothing that will de-throne H110 as THE magnum powder.

[megasupermagnum]

Warning, the following is not to be consider load data.

Some more data for you guys with the 137 grain SWC. Accurate 31-137K mold. I only had enough to test 300-MP today.

GP100 5"
62 degrees temperature today
137gr SWC
1.605" OAL
CCI 550 primer
300-MP

12.0 gr- 1231 fps AVG: 69 fps ES
12.5 gr- 1296 fps AVG: 41 fps ES
13.0 gr- 1336 fps AVG: 31 fps ES
13.5 gr- 1367 fps AVG: 69 fps ES

I recorded the extreme spreads today, as this is the first time they have been what I consider reasonable. 12.5 and 13.0 is actually pretty good. My guess is H110 will be better though. The other thing is the velocities were well below expectations. Consider that with the same exact bullet in the same exact gun 7.0 grains of bluedot turns in around 1220 fps, and 8.0 grains turns in around 1350 fps. So we have effectively matched bluedot, with a lot more muzzle blast and less consistency.

I have to say I am not impressed with 300-MP at all so far. I am done with the chronograph for now. Unless by some miracle the accuracy bests H110, even with most loads turning in 90+ fps extreme spreads. I don't see it happening. It was a fun experiment anyway.

[dangitgriff]

I plan on using H110 and Accurate No. 9 for my load development with 100-grain XTP HP’s. I tried the factory Hornady and was satisfied with the accuracy from my SP101 3”.
Thinking about acquiring a Henry in 20” for Christmas this year and revisiting this thread. Maybe the Moderators would consider making it a sticky like they thankfully did for the .41 mag...

[DHDeal]

I read this thread each time there is an update (and thanks for keeping it going). Due to tests here and articles over the years, I tried AA9 and now have some Bluedot for the 327.

With my 2 molds for the 327 (MP Sledgehammer and Accurate 31-126D) I have tried H110, HS6, and N350. All shoot accurately and can't say I would not be happy with any of them, but.....

I've had to jump through some hoops blindfolded to get my 327 to really like cast due to very tight throats, but I just did what I felt needed to be done. Anyway, AA9 at 9.3 grains, Sledgehammer GC with PC, Fed 200, and Starline brass will group into a spot on my steel at 50 yards. H110 is just about the same but with a blast you can see in daylight. Since I'm a huge fan of H110 (I use more of it than any other revolver powder), it's not like I didn't know it would be a light show. AA9 has less blast and accuracy is stellar with both of my bullets. Unless something better comes along for the 327 (maybe a heavy jacketed JHP) the 2 molds I have and either H110 or AA9 should cover me as this combo and the revolver I have make me smile!

I considered 300-MP due to reviews for the bigger calibers, but considered that I have about 12 pounds of H110 and I "know" H110. Thanks for adding your review of it for the 327 megasupermagnum.

[PositiveCaster]

How did BlueDot work for you? It is stellar in my .32 H&R, wondered how the accuracy is in the .327. It won’t be as fast velocity-wise as AA-9 or H110...


.

[BustedFlipFlop]

Aight. New guy here, resurrecting an old thread.

I've been playing with the 31-137k (Lyman #2, pc; CCI 550; Fed brass; 1.605" COL) and Blue Dot out of my 16.5" Henry (primarily). I've been running 5 round ladder loads, 0.2gr steps, starting at 6.0gr, currently at 8.0gr. Velocity increase is pretty dang linear, no crazy spikes. The 8.0gr load is clocking 1586 fps, 34 ES.

8.0gr loads show no sign of overpressure. Easy extraction, and honestly, the primers look better than the factory AE 100gr loads.

So I'm curious if, in the last 4 years, any of you fellas have found a max load with this particular boolit/powder combo?

[BustedFlipFlop]

I did find a notable difference between CCI 550 (SPM) and WSP primers, with the Winchester small pistol giving both a notable increase in velocity and decrease in ES. These were the only 2 options I had on hand, and I only tried them in the 7.0gr load. But I intend to run another ladder from 7.0 - 8.0 using the WSP.

31-137K
7.0gr Blue Dot
CCI 550
Fed brass
1.605" COL
1494 FPS, 59 ES

31-137K
7.0gr Blue Dot
WSP
Fed brass
1.605" COL
1560 FPS, 25 ES

[BustedFlipFlop]

Guess I'm the only guy still playing with this stuff. I guess it's still good for posterity, though.

Worked up some more of these loads using WSP primers this time, 7.2gr - 8.0gr Blue Dot. Stopped after the five 7.6gr loads because of case head separation issues. One crack was open enough for dirty blowby. The other 6 were incipient, not actually open. There was a total of 15 rounds fired, so not a good average, to say the least, lol.

However, I have a sneaking suspicion that this problem is more due to crappy Federal brass and an undersized Lee sizing die. The velocities were all right were expected, ES was in the 20s.

Fired brass measures .337", and the Lee sizer squeezes them down to about .3295". Seems a bit excessive, and gives the cartridge a barbell shape. All cracks are obviously just above the webbing, right at the sharp transition to the undersized body diameter. Running fired brass through the gutted FCD squeezes them down to .335", which seems quite adequate.

I think I'll keep the remaining 70 or so pieces of brass in this batch separate and see if they continue to fail with proven loads. Gotta see if I can find some Starline.

[Minerat]

Starline is now taking backorders on .327 federal. Lot of 500 @ $154.00.

[BustedFlipFlop]

I appreciate that. But I've had 480 Ruger brass on backorder with Starline for going on 2 years now, lol. Maybe they're quicker with 327?

Luckily, it looks like Midway and Midsouth have some in stock.