Powerbond Bullets


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Walkalong
September 27, 2009, 05:40 PM
I recently bought some 125 & 158 Gr .38 caliber Powerbond bullets from RMR (http://www.shop.rmrbullets.com/category.sc;jsessionid=4409B1F0F0173395A4A89C8F0F32E474.qscstrfrnt03?categoryId=13). He (longdayjake (http://www.thehighroad.org/showthread.php?t=459572)) is a poster here on THR.

They were shipped promptly and are very nice looking well formed bullets. I promised a report, so here are my initial findings.

They are touted to have very thick plating and that they can be roll crimped and shot at magnum velocities.

My first test of that theory was to use a heavy taper crimp some of the 125's with 9.1 Grs of N340. That is a proven load with 125 Gr jacketed bullets with either a medium roll or a heavy taper crimp. Those shot very well at an average 1336 FPS with no signs of tumbling or losing any plating. I don't have the target.

Today I loaded some of the 125's with 8.1 Grs of N330. (Out of N340)(Unique is next) I need to bump it to 8.2 and try again, but again those 125's shot pretty well with no signs of damage. This time at an average 1267 FPS. I shot a 6 shot group through the chrono at 7 yards. I am sure they will shoot better than this group. My first group of the day (today it was the only group) is never my best.

I also shot the 125's with 4.0 Grs Clays with a light taper crimp and they shot well with that proven load, but I am not looking for a bullet to replace my light load bullet. My interest in these is to see if they can be used for my midrange .357 loads and so far so good.

The next step will be to shoot them at even higher velocities. They do not seem to mind, accuracy wise, a heavy taper crimp at high pressure, but do not seem to like a heavy crimp at low pressure, but that is no big deal since a heavy crimp at those low velocity target/plinking loads is not needed anyway. Just something I noticed.

I yanked the trigger on the shot down, and was just careless with the shot up. Probably should have used glasses.

6" Trooper Mk III - Powder bond 125 HP at 1267 FPS - 7 yards

http://www.thehighroad.org/attachment.php?attachmentid=106256&stc=1&d=1254087212

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longdayjake
September 28, 2009, 07:49 PM
Thanks for the report. Do you mind if I copy this and post it on thetestfire.com?

Walkalong
October 10, 2009, 01:18 PM
Loaded up some more Powerbond 125 Gr HPs with 8.2 Grs N330 & 9.1 Grs N340.

I shot my first target with the N330 load with the powder back. I really concentrated to see what it could do group wise and was rewarded with a nice little group.

I also shot that load powder forward, as well as the N340 load powder back, but did not take as much time and the groups, and while still respectable, opened up some.

I used a heavy taper crimp on the bullets. They definitely proved they could take a heavy taper crimp, as well as velocities in the 1250 to 1300 plus range with no skidding/tumbling etc. Passed the test as far as I am concerned. Good bullets for medium plus .357 loads.

I also loaded 5 rounds with a low start load of 16.0 Grs of AA #9, but it gave hardly any more velocity (1372 Avg with one at 1454) than the other loads and did not burn quite completely with poor ES & SD numbers. They showed no signs of tumbling either.

http://www.thehighroad.org/attachment.php?attachmentid=106429&d=1254418794
http://www.thehighroad.org/attachment.php?attachmentid=106916&stc=1&d=1255194567
http://www.thehighroad.org/attachment.php?attachmentid=106920&stc=1&d=1255194948

Walkalong
October 10, 2009, 02:23 PM
Forgot to post this pic. The flash from the previous pic (I always take several and delete most of them) caused that 1754 FPS reading. One was 1800 something.

Chrono is at 5 yards and the target is at 7 yards.

http://www.thehighroad.org/attachment.php?attachmentid=106923&stc=1&d=1255198931

srsmith
October 10, 2009, 02:26 PM
Looks like these are worth a try in my 41.

Email sent.

-steve

longdayjake
October 10, 2009, 06:06 PM
Thanks a ton for this awesome post!!! Thats some pretty good shooting regardless of what bullets you use.

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