Baffled321
Active Member
Do you have the latest load data? If so would you mind either posting it here or sending it to me?
6.5 PRC
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The_Whitetail_kid
Well-Known Member
Agree with the others work up a load to work in all conditions. My dad has a 6.5 PRC and it got up to pressure real fast with H1000 and the 156’s. In Texas, where it’s 100 degrees every day in the summer.
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waspocrew
Well-Known Member
That’s the first thing I checked when I saw your post. We must have the same data as the min max charge weights lined up with what you posted.
Txcowboy50
Well-Known Member
I think 58 gr of H1000 is too much powder for 156 gr Bergers regardless of the temperature.
I am loading 156 Berger's over 56 gr of H1000, 2.280 CBTO with velocity 2950 and .3 moa with no problems in Texas. This is the sweet spot for my 6.5 PRC , Zermatt TL3 action and 26" Proof CF barrel. Any loads hotter than this (and I stopped at 56.8) showed pressure and groups expanded to 2" @ 200yds. Back off the powder in increments until find a sweet spot with good MOA and velocity.
I am loading 156 Berger's over 56 gr of H1000, 2.280 CBTO with velocity 2950 and .3 moa with no problems in Texas. This is the sweet spot for my 6.5 PRC , Zermatt TL3 action and 26" Proof CF barrel. Any loads hotter than this (and I stopped at 56.8) showed pressure and groups expanded to 2" @ 200yds. Back off the powder in increments until find a sweet spot with good MOA and velocity.
ICMDEER
Well-Known Member
That's an average through my chronograph. I don't have the data in front of me, but it was pretty consistent. Less than 25 fps variation if I recall correctly. I live at 4300 feet and the temp was about 70 degrees when I shot to get that data. Seems to be pretty close, but not perfect on my ballistic app. I shot it at 411, 522, 650 and 833 yards this morning and it was consistent and accurate. (I know, odd yardages, but that's how my range sets up due to topography.)
You'll get it figured out. Best of luck. The guys on this site have excellent insight and experience.
WYO300RUM
Well-Known Member
I use 56.0 grs. RL26. If it's warm out I get sticky bolt. Same thing happens with 80.0 grs RL26 with 180-182 Hammer when gets hot but shoots great. I tried 90.0 grs RL26 WITH 182 Hammer in 300 RUM a week ago. It was about 75 degrees. Not very warm. Had no pressure signs and shot great. Going to load hotter. I'll bet if it's a warm day I'll get pressure signs quickly .
I have burned many 8lb jugs of H1000 in 3 different .300 Win Mag rifles and multiple barrels over the last 20 years or so and have found it to be very temp stable. If your load is showing high pressure, I'd say it probably has more to do with just too much powder, and less to do with the temperature.
WYO300RUM
Well-Known Member
I'm going to try some loads with H1000 also after today. I have quite a bit of it and Retumbo. May try Retumbo also. Have to sight in today .
randy86314
Active Member
If you need a mallet to open the bolt, then your loads are too hot. You are pushing the brass to its limit, in my cautious opinion. 95 degrees is warm but not as warm as carts left in the sun.
Have you stretched the brass just above the extractor groove? I wouldn't use that brass again.
Have you stretched the brass just above the extractor groove? I wouldn't use that brass again.
Baffled321
Active Member
Thanks for your help! I got the new load data from Berger and have loaded some at 53 grains. Pulled any remaining hot loads and burned off the powder from them.
When you get above 90, strange things start to happen. Even with the temp stable powders to some degree. I'd listen to your rifle.
I would back down on powder, maybe even try another bullet.
I would back down on powder, maybe even try another bullet.
| 55.0 | 2,801 | 61,100 PSI |
I'd advise to drop way the heck back!
Tis your call though
