tripple 7 powder

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grandpaclark

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I am sort of new to muzzle loading though I shoot center fire rifles regular and reload my ammunition.
I cannot seem to get an accurate group with my CVA accura and t7 powder. I noticed the grain of the powder was very inconsistent , from fine dust to a regular looking kernel. Is this normal for t7 powder or do I have a bad bottle of powder?
 
grandpaclark said:
I am sort of new to muzzle loading though I shoot center fire rifles regular and reload my ammunition.
I cannot seem to get an accurate group with my CVA accura and t7 powder. I noticed the grain of the powder was very inconsistent , from fine dust to a regular looking kernel. Is this normal for t7 powder or do I have a bad bottle of powder?
Click to expand...
Welcome and hi !!! Mz's are alot more finicky than what youre used to !!! Many , many things could be the issue . Tell us about your componemts and procedures......k???
 
I am shooting Harvester Scorpion PT Gold bullets , 300 gr , with 100 gr T 7 powder measured , at 100 yards pattern of shots is within 1 inch horizonal , but 4 to 6 inches spread vertical, to me that means powder charge is in accurate .
 
grandpaclark said:
I am shooting Harvester Scorpion PT Gold bullets , 300 gr , with 100 gr T 7 powder measured , at 100 yards pattern of shots is within 1 inch horizonal , but 4 to 6 inches spread vertical, to me that means powder charge is in accurate .
Click to expand...
Yep it would seem thats a velocity spread !!! Id suppose you have made sure your volume measure is filled then swiped off level ?? Even pressure seating the bullet also matters from load to load . Personally i use a tool to get consistant pressures when loading called a Powder Packer . Really helped me for smaller groups . Ive not had T7 get very dusty on me but many bp subs are very inconsistant in grain size .
 
Sideshow said:
Yep it would seem thats a velocity spread !!! Id suppose you have made sure your volume measure is filled then swiped off level ?? Even pressure seating the bullet also matters from load to load . Personally i use a tool to get consistant pressures when loading called a Powder Packer . Really helped me for smaller groups . Ive not had T7 get very dusty on me but many bp subs are very inconsistant in grain size .
Click to expand...
Sideshow said:
Yep it would seem thats a velocity spread !!! Id suppose you have made sure your volume measure is filled then swiped off level ?? Even pressure seating the bullet also matters from load to load . Personally i use a tool to get consistant pressures when loading called a Powder Packer . Really helped me for smaller groups . Ive not had T7 get very dusty on me but many bp subs are very inconsistant in grain size .
Click to expand...
Sideshow said:
Yep it would seem thats a velocity spread !!! Id suppose you have made sure your volume measure is filled then swiped off level ?? Even pressure seating the bullet also matters from load to load . Personally i use a tool to get consistant pressures when loading called a Powder Packer . Really helped me for smaller groups . Ive not had T7 get very dusty on me but many bp subs are very inconsistant in grain size .
Click to expand...
I think I will try weighing some loads and I will look into the powder packer,Thanks for the advice.
 
Items that come to mind

-Old/contaminated powder, T7 will absorb moisture from the air
-Not swabbing between shots
-Not waiting between shots for the barrel to cool before reloading, sabots don't like heat
-Is your ramrod marked so you know when your bullet/sabot is on top of the powder?
-Go up 10 grains by volume and see what it does
 
My first rule of thumb is to try different load volumes. Almost always gives a solution. In 50 cal with T7 3f I start at 70 grains. Oddly I have 3 guns that love 70 gr. All 50 cal. One is a roundball gun. The others I shoot 400 gr full bore lead conicals. I’ve killed a couple elk n many white tails to 160 yds. Everything I’ve shot with conicals has been a pass thru so I’ve never retrieved a bullet. Plenty of power
 
grandpaclark said:
I am shooting Harvester Scorpion PT Gold bullets , 300 gr , with 100 gr T 7 powder measured , at 100 yards pattern of shots is within 1 inch horizonal , but 4 to 6 inches spread vertical, to me that means powder charge is in accurate .
Click to expand...

Adjust the charge, which could be either way and maybe only amount to 5grs.
 
You really have to swab between shots or you are not going to get the accuracy you want.second shot for hunting is okay, but not at the range. and like said here earlier let the barrel cool
 
My Accura doesn't shoot well either. 3 different powders, and many bullets, and I haven't been able to get it to shoot well. I'm almost ready to send it back.
 
Agree with above comments but:
Verify all mounts and rings tight,
Back off to 50 yds to start, then move to 100yds when you get good groups,
Start with 80gr then move up in 5gr increments to see what charge gives best group.
Use sand bags and a rear support,
Let barrel cool 5 min between shots,
Swab with spit patch between shots with 777 or any BP substitute
use same primers each shot, try different powder, pellets, brand if you have them. Clean or new breech plug. Try different bullets, sabots. Don't get me wrong, I love Harvester I use the .430 44/50 with green crush ribs but every rifle is different. 300 gr .452 XTP over regular or crush rib is a proven affordable choice.
You're probably doing some of these but that's my checklist for myself.
Seriously consider switching to Blackhorn 209, and appropriate Breech plug, no swabbing, more consistent especially when weighing.
I loved 777 untill I found Blackhorn.
 
grandpaclark said:
I am sort of new to muzzle loading though I shoot center fire rifles regular and reload my ammunition.
I cannot seem to get an accurate group with my CVA accura and t7 powder. I noticed the grain of the powder was very inconsistent , from fine dust to a regular looking kernel. Is this normal for t7 powder or do I have a bad bottle of powder?
Click to expand...
You may be changing the way you are holding the rifle at the forearm if it is only vertical group spread. Try using your sling to pull a mild downward pressure at the forearm as you squeeze the trigger. Don't touch the barrel.

Or your powder loads are causing to much recoil and muzzle jump at 100 grains.
I have the same issue with a CVA Optima Pro which is heavy due to extra long barrel.
The variation is mostly in the vertical direction for the groups.

Make sure you are using good 209 primers that hot enough to have great ignition.

I ran a test on BH 209 powder using different loads from 80 to 100 gr shooting Hornady 250 gr SST. As I went up on the powder charge the muzzle jump got worst and the misses where going upward bad at 100 grains. It gets out of control at 100 gr.

The same test was done with my CVA Optima V2 LR. It was more stable for charges up to 100gr but still the group chatter was mostly vertical. The best powder load results came at 90 gr or before. At 80 gr the groups are good to go.

The Optima is the best and I believe the reason is the shape of the stocks between the two. The Optima has a lot less drop in the stock then the Optima Pro. The added drop provides more of a lever arm to force the muzzle to jump on the Pro. If I could find a better stock for it I would be willing to switch for better results.
And you might be interested to know I shoot off bench with a Lead Sled.
 
mnoland30 said:
My Accura doesn't shoot well either. 3 different powders, and many bullets, and I haven't been able to get it to shoot well. I'm almost ready to send it back.
Click to expand...
I shoot an Accura V2 with the nitride barrel. My load is 77 weighed grains of Blackhorn, a Win 209 primer, a Deep Curl 300 gr bullet out of a Harvester Crush rib sabot. It shoots an almost constant 2034 fps. Some folks like the shiny harvester better, mine shoots best with the crush rib.
 
MSalyards said:
I shoot an Accura V2 with the nitride barrel. My load is 77 weighed grains of Blackhorn, a Win 209 primer, a Deep Curl 300 gr bullet out of a Harvester Crush rib sabot. It shoots an almost constant 2034 fps. Some folks like the shiny harvester better, mine shoots best with the crush rib.
Click to expand...
Wow! How do you do it? Western BH chart of velocity for a 300 gr bullet doesn't indicate that much velocity unless it is pushed with 120 gr of BH.
 
grandpaclark said:
I am sort of new to muzzle loading though I shoot center fire rifles regular and reload my ammunition.
I cannot seem to get an accurate group with my CVA accura and t7 powder. I noticed the grain of the powder was very inconsistent , from fine dust to a regular looking kernel. Is this normal for t7 powder or do I have a bad bottle of powder?
Click to expand...
Ya sure pick the right place & the right group of guys to ask these type of questions to. As you can see, there are so many knowledgeable & experienced guys in here that are more than willing to teach New'bs or anyone else that asks. I've learned so much in the last 6 mo of being a member in MML. It looks like your precess of elimination is in the right direction. Good luck. Kind regards
 

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