Velocity is a bit on the high side for loading for 1600FPS.
But I don't like the way this powder works in the Lee Powder Measure.
It may have been closer to 14gr., even though I test throw several charges and weigh them before loading.
Well, whatever.

Changed the scope to 7X, wish I had one that goes to 10X.
5X not really enough for me.

All the brass is mixed headstamp cut down and sized from .223 and 5.56 NATO, so it is all random.
The flash hole was drilled out to 7/64" and CCI550 Magnum SPP used as I read on some other sites.

 

The COL might be right but ordinarily you would seat a bullet so the the crimp would be in the cannula.

 

Seating the bullet to the middle of the cannelure makes the OAL 2.080", which is below any minimum I found listed.
I can load up 5 and see what happens, but I trust Hornady's data more than anyone else.

Data for 1700FPS loads in a few.

 

Make sure your calipers are zeroed back to 0000 when closed. They may be off or you are reading them wrong.

 

Question for gwk1951, OP of this thread.

I am having a problem with my conversion tables as compared to yours. OAL of 2.220 acording to my calipers is only approx 2 3/16 inch and your diagram is showing 2 3/8 inch. This would make your loaded rounds too long by 3/16 inch. By making them shorted the case would be loaded up to the bullet crimp ring. This will make quite a difference in how much of the case mouth is gripping the bullet by another 3/16 inch. Correct me if I am wrong in this assesment. I am thinking these are not fitting in your rifle chamber without them hitting the lands of the barrel and being pushed back farther into the case. To test, load 1 and then eject it back out and remeasure it and look for rub marks on the bullet tip.

 

The ruler was not placed to show OAL, just the amount of bullet that is gripped by the case with the 2.220" OAL.
If you look closely you'll see the ruler is another 1/8" off the tip of the bullet.
With these charges putting the bullet into the cannelure would mean a crush load and maybe exceed the pressure.

There is another load I tried with H110 that is 14.8gr and OAL of 2.095" minimum, 2.135" nominal and 2.180" maximum.
They didn't work so good.
2.095" puts the bullet in the case right to the bottom of the cannelure and doesn't need a crimp. Plenty of bullet to grab onto.

Hornady says max load is 15.9gr.

I think I will do one bunch of 10 with just under max load using 15.5gr H110.

 

Sounds like a pain to load for. Bullets, too, are built for higher velocities I'm betting except for flat nosed .30-30 bullets.

I don't know if it helps to mention, not exactly answering the OP, but I've found the 150 Nosler BT to work very well on deer from a .30-30 pistol pushing about 2050 fps. Used to be a 135 grain Sierra Pro Hunter bullet designed for the .30-30 pistols that I fired out of an SKS and have killed two deer with, but they stopped production on that bullet. Bummer, as it was a good one. It was a flat based bullet which IMHO is better to load over cases with limited capacity like .300 BO and 7.62x39. I don't think it even had a crimp channelure. What I do with 7.62x39 is crimp with a Lee factory crimp die. No need for a roll crimp, works very well.

That's all I got, don't load the .300 BLK OUT specifically. Just thought this little bit of experience might help you make decisions working up a load in this caliber.

 

Same bullet for 7.63X54R OAL puts the case just below or on the cannelure, depending on whose data you use.
Same goes for the 30-06, 3.250" OAL puts the cannelure right on the neck.

Yeah, I still have one fired case from when I had a Mossberg ATR 100 in 30-06.

I buy the 150gr. because they are the cheapest. $26/100.
Any other .308 bullet gets expensive either side of that weight.
'Cause they ain't FMJs.

 

Do you have a caliper? If so, remeasure a finished load and verify what the OAL is. If you don't have one put a finished round beside your ruler with the tip at o" and take another picture and post it. I am not yet convinced you are getting a finished round@ 2.220

 

I do have a caliper as you see in my previous post.
I measure every few cartridges to make sure they stay consistent, +_ .005"
Now if y'all excuse me for a few minute, got to make up another 10 rounds at 15.5gr. H110.
And I'll post a pic with the caliper.

Not every single one will measure exactly the same.
What I read is that the die seats the bullet NOT FROM THE TIP, but uses the ogive so as not to damage the tip of any bullet.
Bullets will be slightly different lengths if not Match Grade, these aren't.
OAL will vary as much as +- .005"
The 10 I just made up come in at 2.219" to 2.223"

 

OK, that looks right for 2;220 +/- but what bullet maker is that bullet from and what is the weight. I would like to check if the published OAL is what that manufacture recommends for this exact bullet..

 

 

Everything looks according to book specs. Hornady is stuck on 2.220 for all their 150 gr bullets even though some are shorter than others. I would wonder why they didn't use a shorter OAL for the shorter bullets because the end result would place the back end of the bullets at the same place inside the case. That is a little of a mystery but we can't argue that it not correct. Looking at other data sources might recommend a shorter OAL as you have posted. Keep us poster of newer results in your next tests.

 

Last 10 rounds loaded for ~1800FPS but not the maximum charge.

What bugs me is the lack of consistency from the first 5 rounds to the second 5 rounds.
I'm not that bad a shot, although the scope might be part of the problem, only 7X max.
I really like 10X and if you've seen my .223/5.56 targets you'll understand.

Now I have to decide what is the best for me to use on the next 100 rounds.
The lower velocity are looking better as far as consistent FPS.
But then some of the faster ones look better for grouping.
Maybe what I'll do is use the lower speed load and shorten the OAL to get closer to the cannelure.
Then I won't need the crimp if there is more bullet in the case.

More testing is in order and back to this tomorrow.

 

I also sent of a contact message to Hornady about the discrepancy in FPS from their load data and what I recorded.
I asked how they came up with the data.
Doubt if I'll hear back.

 

Sighting in on a target at 50 yards. IMO only, for my use I find less power at close range leads to be better accuracy. If it were me, I would not use more power than 4 X at 50 yards. I find the higher settings of 7x or 10x are harder to keep from moving off the aim point. At those higher powers you will notice a lot of roaming of the cross hairs unless you are extremely stable. I use a 3x9 scope and at 100 yards I never use it higher than 4x. Try it sometime and see if it makes a difference.

 

Nice discussion. I'm am going to move it to the reload subsection of the ammo section. You might get more intended traffic there.

 

I made up 50 rounds this morning using 12.0gr. H110 (Yeah. I know. Below minimum by .3gr.) and shoved the bullet in up to the cannelure for OAL 2.100"
As soon as the yard dries up after the overnight rain, I'll chrono them.

Purty, aren't they?

 

They look great, we will keep our fingers crossed that they shoot as good as they look.

 

Well, I had an anomaly.
No idea why the velocity jump, and that is probably the flier shot also. Or me.
Bench/bipod, 7X

I will shoot one more target to see.

Actually shot 2 more targets. Chrono missed a shot so I raised it up some more.

Not real thrilled with the grouping, but it is what it is.
I need more magnification to see that center better.
Maybe next month a new scope.
I would swap the Nikon P-223 to the 300BLK, but then I have to waste ammo to rezero it.
I'll give this scope a couple/few clicks up and left and try "ONE MORE TARGET".
I will take my time on each shot to try and hit dead center.

 

Red center helps a lot.
Except for the first shot, nice grouping now, I can see the darn center at 7X.
Still going to get a better scope.
First shot was slow and so I marked it.
I think I may push the bullets in a bit more to the center of the cannelure, OAL should be about 2.080" or something then and shoot "ONE MORE TARGET". yeah, right.

Maybe another 1 or 2 clicks left.

 

Just so y'all know I think it is the scope and the ammo, not ME.
I took Casper556 and some new loads of Hornady Match 22 CAL .224" 52gr. BTHP with 26.4gr. IMR4895 OAL 2.230".
50 yards, bench/bipod, 10X, Nikon P-223 BDC600 4-12X40mm.
Holes too close to use OnTarget. But I'll try.
Chrono.
3009
3115
3117
3141
3148
See result in rifle shootout thread.

NOW, back to 300BLK after these commercial breaks.

 

You need to work up some ladder loads.
Use the same bullets, powder, primers, and loads, change the OAL.
Use the same OALs as the first loads change the powder charge.
Use the same OALs, powders charges, change primers.
Try neck trimming.
Try weighing cases and separating by weight and MFG.


Have fun!!!!

Remember, rifles are people too.
Every one is different.

 

I have a lot of powder left, but ran out of bullets until next month (on SS, so limited funds).
And I absolutely *HATE* the way H110 meters in the Lee Perfect Powder Measure.
The stuff is so fine it gums up the works, lots of binding of the lever, and it doesn't throw consistently.
I need to find IMR4227 again, but BPS was out when I went there, which is why I bought the last jug of H110.

I'm satisfied with it for now.
A better scope will definitely improve matters.

 

I use Winchester 296 for 300BLK. I don't have a chrono, but accuracy at 100 yards is pretty good with 125gr Nosler Ballistic Tips and 150gr Hornady FMJBT.

 

Anyway, I inquired to Hornady how they get their load data for 300BLK because my FPS don't match what they give.
They did answer.
" To develop the data we used a factory barreled S&W ar-15. It has a 16” barrel and a 1:7.5” twist rate. For velocity, we shoot using an Oehler 83 system. It is certainly not uncommon to have velocity differences from barrel to barrel as there are so many factors that attribute to it. "

 

Anyway, I inquired to Hornady how they get their load data for 300BLK because my FPS don't match what they give.
They did answer.
" To develop the data we used a factory barreled S&W ar-15. It has a 16” barrel and a 1:7.5” twist rate. For velocity, we shoot using an Oehler 83 system. It is certainly not uncommon to have velocity differences from barrel to barrel as there are so many factors that attribute to it. "

http://www.oehler-research.com/custom/system83.html