Shooting the Same Load and Getting Different Results. H335 with 73 ELD Match

In this video, I am  Shooting the Same Load and Getting Different Results. H335 with 73 ELD Match. Shooting five 5-shot groups at 100 yards. My thinking is that it was the powder dispensing that made the difference in these two outings although that doesn’t seem completely reasonable either. I have no idea why that previous test grouped so poorly. The dispensing is the best thing I can come up with. Or possibly a difference, and how the rifle barrel was cleaned, but that doesn’t seem to make a lot of sense either. 
Linked to previous video below:
 Load Development: H335 powder with 73 grain ELD match
• Load Development: H335...

[@lemonaid1605]

A quote from David Tubb's approach to load development "Vertical string = powder charge, Horizontal string = seating depth". It's a worth it to watch that interview.

[@EverydayReloadingandShooting]

Thanks. I'll check him out.

[@Salmon3651]

Great video. I am befuddled on this one. Those drop measures are pretty consistent, I use an inexpensive lee perfect measure and it is consistent to about 1/3 grain. Plus you double checked with a scale. Regarding the bridging from a drop measure, I get terrible clumping when I use a bunch of case lube if I don't tumble it after sizing. But I always notice because, well you see it clump at the mouth and it just gets powder everywhere by your dropper. I always double check with a scale every so often using a dropper. I read all the other comments looking for their suggestions.

[@EverydayReloadingandShooting]

Same here Michael. I have no clue. My best guess was it was the powder dispensing, but maybe it was a dirty barrel. I didn't clean it as usual, but still I can't imagine if I had not cleaned it at all that the groups would be that scattered. I suppose that's a question I'll have to ask the Lord when I get to heaven. He would know. 😀

[@RimfireAddicted70]

I think you might try something either heavier or lighter. I say this as there is several videos out of some high end precision guns shotgun grp printing a certain weight and the next step up or down gave unbelievable tighter groups, I'm talking about night and day difference. I think when the results are this bad buying a box of 50 and trying it is worth it because to chase loading a fairly pricey round is just lost money and time. Looking for ward to more videos.

[@EverydayReloadingandShooting]

Thanks. I believe you're right. I'll be posting results shortly of today's outing at the range shooting 68 BTHP. They performed poorly. So I'll be running a ladder test from minimum to maximum charge weights. Thanks for watching

[@mitm19]

Interesting results. I've never used that RCBS dispenser but I had problems with static electricity causing bridging with a Lee dispenser, I ended up grounding it to a house ground to stop it from happening. It probably wouldn't have been a problem in the summer but the house was really dry during winter heating season. Just a guess.

[@EverydayReloadingandShooting]

I think it's a good practice for any powder dispenser to clean it thoroughly before using, and then wipe it down with a dryer sheet. That will reduce the static electricity. Also, with Lee, they said to run a full canister of powder through the dispenser Through a normal dispensing process before using. That takes care of the static also. Thanks for watching.

[@Dr_S]

Question - If you are trying to create a specific load… shouldn’t you shot from a sled or a more stable rest taking human error out of the situation as much as possible?
Thank you for posting the videos…
I really think you need a chronograph also… Garmin as a really nice one 😊

[@EverydayReloadingandShooting]

Dr. S, thank you for watching. Much appreciated. It is my understanding that the sleds can actually cause damage to a rifle. I think my shooting is good enough that I can get a sense of how well a load is grouping without that. I'm not sure what additional information I would get from a chronograph. I only shoot at 100 yards indoors. I'm not a hunter, and I don't shoot long range. I know that variations in velocity are important for long range shooting, but I don't do that. I mostly focus on Group size.

[@vakama9053]

@@EverydayReloadingandShooting Re: the chronograph
It might be useful to be able to register significant deviations in velocity, as that would indicate that you've probably got some sort of issue with your powder, whether it's an incorrect charge, or incomplete combustion, or something else. On the other hand, if your velocities are stable, you could probably rule out the powder as a cause and know that you probably need to look to the bullet or the barrel to find the issue.

[@EverydayReloadingandShooting]

@@vakama9053 good points, V. I won’t rule out the chronograph in my future. Some things are just a matter of time, and money. Thanks for the input, and thanks for watching.

[@jamespollard1670]

I'm more inclined to think the barrel needed a good scrubbing. H335 meters so well I don't think it was the powder throw?

[@EverydayReloadingandShooting]

Hey James. Yeah, I’m kind of feeling the same way. It’s a little bit embarrassing though to think that crappy shooting was the result of just not cleaning the barrel properly. Yes, one way to find out would be to shoot two targets; one with the barrel, cleaned, which you know to be the right way and thoroughly clean, and the other way, just so so clean. Might be interesting. You may be right though. as always, thanks for watching.