Quarterbore.Net Forums


Go Back   Quarterbore's Forums > 300 Whisper Forums > 300 Whisper Ammo and Reloading
Home Forums Classifieds Photo Server FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #21  
Old 11-11-2008, 08:01 PM
amafrank's Avatar
amafrank amafrank is offline
Senior Member
 
Join Date: Jan 2008
Posts: 197
On your question about crimping you are better off not crimping at all. The crimps can vary considerably without you noticing any difference in the handle pressure. There is no real reason to crimp with this round even in a semi auto since the recoil is so low you won't pull any bullets in the mag. I have been using H110 and 2400 with great results both accuracy wise and with brass life too. I am primarily shooting bolt actions but I use the ammo in the SIG 552 as well. I had to do a bit of super modding on the gas system to get reliable cycling and the AR platform is not much different. I can tell you that the difference between different powders is enough that one load will not cycle the gun though its supersonic where another will cycle fine subsonic. Powder selection is a very important consideration in operation.
Glad you are getting some of this stuff worked out and good luck
Frank
Reply With Quote
  #22  
Old 11-25-2008, 10:46 AM
jinx44 jinx44 is offline
Junior Member
 
Join Date: Oct 2008
Posts: 11
Chronograph came in yesterday. I went with just an entry level, cheap one as my first chrono. Its the Shooting Chrony F-1 Master with the remote display.

Of course, it was dark when I got off work last night, so I couldn't play with my new toy. However, lighting was perfect this morning. Temp was 33*, and I set the chrono about 10' in front of the bench.

I had loaded 2 each of 5 different amounts of 1680 for chrono testing, but I just started with the lowest load which was 11.2gr. Seeing as how its the last day of deer season here in MO, I didn't want to shoot too many times incase any of my neighbors were waiting for that last chance at a big one.

The 11.2 gr loads yielded velocities of 1061 and 1080. I walked back inside and quickly loaded a round at 11.0gr, which had a velocity of 1026. I wasn't sure what the SOS was at that time of day, but after looking it up when I got to work, it should have been around 1088 @ 33*.

All of the rounds still had a "crack". So obviously I am sub-sonic now, and it has just been an echo that I have been hearing. Now its time to sit and wait for the paperwork to obtain a can to go through.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:18 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.