This question is about 10X powder exclusively.

Looking for users of 10X just for any insight with loads they have tried.

The Winchester I have is a lightweight with a one in twelve twist.

I have tried many loads and bullets over time and actually found that more powder would always raise the POI and shift it to the right. Same with factory loads and 5.56 always higher and to the right.

I almost ran out of data until I decided to lower the charge and bingo there was a good group. The gun does not shoot max loads well at all.

It also does not like 60 grain bullets or boattails and I will assume the twist is the reason.

The one thing I have not tried are 40 grain bullets which may be a better choice. I have tried 52 grain bullets in several styles but the Sierra 55 grain Blitz SP is the best so far.
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If you have tried 10X please feel free to add your information.

BLM

Without testing the velocity of a particular load you really shouldn't make any assumptions about a shift in the POI. For one thing with a rifle with a bit of drop on the stock a drop in the POI can indicate LESS Dwell Time for the bullet in the barrel, so this can indicate a higher velocity rather than a lower velocity. However, distance to the target can introduce Ballistic factors that can really muddy this particular "rule of thumb". Basically without knowing the velocity at the muzzle, the particular Ballistic Drag of the bullet, and several other factors and some rather sophisticated calculations you can only observe that your POI has shifted, not exactly what caused it.

BTW, I have one load featuring a 60 grain Nosler Ballistic tip that will group under 1/2 inch at 100 yards when I use Varget, however if I load that exact same bullet to the exact same velocity using CFE223 that load will group a huge 12 inches at 100 yards. Don't ask me why this happens because I haven't even the tiniest clue. What I know is I just cannot use CFE223 with this bullet. BTW, with a Hornady 68 grain BTHP in the same rifle CFE 223 and Varget are pretty much interchangeable with sub 3/10 MOA when I'm shooting well enough to do that.

What I would advise is that first find the charge amount where your accuracy is best and stop there. Then if the POI has shifted compared to your other loading either use a different tick on the reticle as your aiming point or adjust your scope by a set number of clicks needed to zero the scope. Obviously either of these will require a bit of note taking but a masking tape label on either the box of ammo or magazine it's loaded in can help in keeping track of what sighting setup to use.

My favorite 10x load is based on Speer and Hornady published data.

It's 21.5 grs. 10x (well under max) under a 55 FMJBT with an OAL of 2.254". No crimp. Out of my 16" 1:7 barrel I chrono 2717fps.

Nice load. I haven't done any serious accuracy testing with it, but it seems to hit where I aim it out to 100 yds.

__________________
USAF, 69-92
Vietnam, 72-73

For some reason I got GOOD accuracy out of the..........
Speer 55gr flat base round nose "Junk" bullet that was not
a sharp pointed spritzer or a boat tail.

A 63gr Sierra sucked in my rifle, yet the Speer heavy 70gr designed like its little 55gr bullet, got tight groups.

Rifles, chambers and barrels make us all scratch our heads on
that happens after we pull the trigger.

I have found that a powder will work with a rifle..........
just that it might be a low fps target load or a full loading. You just never know what is going to turn up.

I don't give out data but keep on trucking.........
and good luck.

Thank you for the replies.Apparently this powder has a very small following.

I'm going to try some more loads to see where this powder has a sweet spot in my rifle.

I suspect it will take 22-23 grains to equal IMR 4198.

BLM

does rl-10x work well in a 358win? ive been thinking bout trying it but would like some info 1st.

I've used 10x in 45-70 and 308win. Good results and have another couple pounds for some more.

RL-10X is my preferred powder for 90-100gr bullets in the 6.8 SPC. I do noy use it in the 5.56.

I would suggest starting low and working up until you have pressure signs or have found an accurate load. Adjust the scope and have at it.

Very happy with it in my Hart barreled .204 bolt gun!

__________________
Good shooting.

It should be very good in the .204.

Also have a 25-20 Savage Sporter I'm checking to see if there is data for 60 and 75 grain jacketed bullets.

Currently I use 12 grains of IMR 4198 with a 75 grain Speer flat points and 13 grains with the impossible to get 60 grain bullets.

10 X should be a good powder as well but lack of data means I have to work this load up slowly.

When I learn anything new, I'll update this thread.

BLM

Ok I had a good range day today. All loads use CCI SRP and 55 grain Sierra sp bullets.

This powder seems to work well in my rifle.

While 21 grains shot a low but a nice group 22 grains was lower and the group was a bit large.

At 22.5 grains the group was one inch and on top of the bullseye. Nice!

I had some Sierra 55 grain btsp loaded with 23 grains to try in the Mini 14 but problems with the scope scrubbed that test.

I fired these in the model seventy and they all dropped into the bullseye.

Not a one inch group but with some load adjustment 10 X might just be the best choice for the 55 grain bullets.

I would love to put the best combo over a chronograph but I have no place to set mine up.

I will in time try some incremental powder charge adjustments but I'm definitely on the right track.

BLM

Since I use IMR 4198 in the .223 and the 25-20 I thought I should try some 10X in the 25-20.

There's no load data for 10X in that caliber. However checking burn rates it seemed safe to use the same charge as listed for IMR 4198.

Twelve grains is the normal charge I use with a 75 grain FP Speer bullet and 13 grains for a 60 grain RN bullet.

So 10X was used at the same level and a little more to see if it was safe for the 25-20.

While I did not exceed 13 grains for the 60 grain bullet there were no signs of any excess pressure and bullets flew straight and true.

I did work the load up to 13 grains with the 75 grain bullet and best results so far were in the 12.5-12.8 grain loads.

The 13 grain load did not perform well with the 75 grain FN Speer.

More testing in the future. Good results so far.

BLM