What kind of real-world velocities are you getting out of your 22" barrels and with what loads - for 300 grain bullets?

this is called cross posting ... please don't do this

your questions are answered in big bores

Doesn't hurt a thing posting here and anywhere else you desire. jeffe gets a bit Full-of-himself on occasion more often than not.

Don't know the answer to your question though, but I'd guess you could estimate it real close by looking in the Manuals. What ever velocity another person happens to get, has little relevance with the velocity you will get.

Best of luck to you.

Rae
My 375 H&H is 24" and faster than normal from what I hear.
I load 71 grains of Reloader 15 with a 300 grain Barnes Triple Shock, FC cases and CCI 250 primers and I get 2694 average, extreme spread of 36 and it can shoot 3 shot .5" groups with a 2.5-8 Leupold on it at 100 yards. This I am told is nearly an impossible speed but my chrony seems to work just fine. If my barrel were 2" shorter I'm guessing I'd lose 50 to 100 fps. I also substitute 300 grain Noslers in the same load but have not chronied those.
These loads are safe in MY rifle please work up to these in yours.
Just for fun you should work up a load in yours with the 25" barrel then go have it cut down to 22-23" and report exact velocity loss so we all can see the results.
Before I started loading for my .375 I did a lot of research and the vast majority of .375 shooters liked RL-15 over the standby favorites of IMR-4350 and 4064 which are great loads in their own right. I tried all 3 and RL-15 showed the best accuracy and least indication of pressure at the top end of the 300 grain loads in my rifle.

quote:

I'm guessing I'd lose 50

RL15 is not that slow a powder and .375 that small a bore. In the what it's worth department I ran your load through QL. For a load of RL15 it gives a velocity of 2720 from a 24" and that reduces to 2677 from a 22" or 47fps. What it also says is the pressure is 76266PSI. If I slow the burn rate a touch so that 71grs gives me 2694 the pressure still reads 72437 and you would lose 45fps going to a 22"

quote:

Originally posted by Hot Core:
Doesn't hurt a thing posting here and anywhere else you desire. jeffe gets a bit Full-of-himself on occasion more often than not.
.

Actually its poor netiquite to cross post. Just plain bad manners. .. this is his THIRD corsspost on the matter ..

Say, about those MANY Thousands of deer you have killed ...

Rae,

Well, Chronographing to me is a pretty integral part of "Reloading" regardless of bore size.

My Winchester Model 70 .375H&H has been chopped back to 20". I've confirmed my chronograph results on many occaissions so I think I've got this one down pat.

I'm .5 grain short of a max load (several sources) for the VVN-160 I'm using with Hornady 300 grain Round Noses and the readings are a consistant 2380 fps. To me this pretty much matches the expected velocity loss from a 20" tube with a 300 gr. bullet-o.

I know I've got a Short rifle ..... whether or not it's Slow - Duuno? Really don't care since I've never had a one of these bullets bounce off an animal yet; normally the animal just keels over.

quote:

What ever velocity another person happens to get, has little relevance with the velocity you will get.

My M-70 in .375 H&H has a 22" barrel and with 300s I can still hit 2600.....

I'm using a compressed load of H-4350.....but can't say for sure what the pressure level is.

Personally I'd think one should be quite able to muster 2550 in a 22" barrel....enough for anything that walk on this planet!

quote:

My M-70 in .375 H&H has a 22" barrel and with 300s I can still hit 2600.....

I'm using a compressed load of H-4350.....but can't say for sure what the pressure level is.

Don't know which bullet but QL says you can do it and stay under 65,000 with H4350 even less if you have a good freebore. PM me your load and I'll run it specifically.

quote:

PM me your load and I'll run it specifically.

Hornady boattail and 82 grains H-4350

quote:

Hornady boattail and 82 grains H-4350

QL calls it 64700.

quote:

Originally posted by jeffeosso:
Say, about those MANY Thousands of deer you have killed ...

Yup, didn't need a single Bubba/Bubbetta Autographed Lead Sled to handle the recoil and then "claim" I actually shoot Large Bores.

quote:

Originally posted by ramrod340:

quote:

Hornady boattail and 82 grains H-4350

QL calls it 64700.

This is within reason based on data on the Hodgdon website in CUP and 1/2 grain over max.

The more I see of quickload the more I like it....

quote:

Originally posted by ramrod340:

quote:

I'm guessing I'd lose 50

RL15 is not that slow a powder and .375 that small a bore. In the what it's worth department I ran your load through QL. For a load of RL15 it gives a velocity of 2720 from a 24" and that reduces to 2677 from a 22" or 47fps. What it also says is the pressure is 76266PSI. If I slow the burn rate a touch so that 71grs gives me 2694 the pressure still reads 72437 and you would lose 45fps going to a 22"

Wow thats some high pressure!
I developed that load for accuracy going up to 73 or 74 grains (need to check my notes) no pressure signs but no accuracy either. I settled on the most accurate which was 71 grains and very accurate only later did I chrony it. I have only shot this load in the summertime in temps of 80to 92 degrees at an altitude of 6800 feet elevation. Don't know if quickload needs to know all that but there it is.
Thanks for running those pressures for me now I don't know about that load.

Jeffeosso, I can't tell if you are joking or not but I promise I won't ever cross-post, cross-dress, cross-my-eyes, whatever again......until tomorrow!


As far as the loads, I have not started on the 300gr. loads yet. I don't know what possesed me, but I originally started out with 270 gr. bullets. I could not get the RL-15 to give any respectable fps. without sticky bolts and poor accuracy. I settled on AA -4350 at (doun't quote me) I believe, 84 gr. of powder. Will check when I get home on Friday. This particular keg of AA powder is very slow. Somewhere in the area of 4831/RL-19. My particular CZ 550 prefers a full case of slow powder with the 270 gr. bullets. My velocity is not all that great either. Low 2700s sometimes upper 2600s. Accuracy is pretty descent at 100 yards and a 2X7 Leup. Euro 30/German #4 reticle. You know, the reticle that blocks out the sun. I figured there wasn't any sense in working up a load for the 300 grs. now if I have the barrel shortened from 25" to 23"or 22" and possibly fluted. Thanks for the info guys. It will help me decide if I should bob the barrel.

P.S. I would like to get at least 2550 fps. w/300grs.

quote:

The more I see of quickload the more I like it....

I'm low on the learning curve but I'm impressed. What I have seen is after making small adjustments in powder burn rate to match velocity in one rifle. That same burn rate will allow a completely different cartridge and rifle combo using the same can of powder to match within a few FPS.

quote:

I have only shot this load in the summertime in temps of 80to 92 degrees

That was at 70deg. QL can be adjsuted for temp. As to altitude I'm still working my way through the 100 page manual. That also assumed a normal throat the longer the bullet jump the lower the pressure spike.

Rae59. The norm is to try and ask a question only once in the best forum. Takes up a little less space and makes it far easier for both those trying to help you as well as others trying to learn from answers given. Hard to follow if you have to track the answer in Bigbores, gunsmithing and reloading.

Thanks ramrod, but I saw someone crucified for putting a question up on the wrong post that was not related specifically to that forum. Since I reload and can change the powders to make a diff in fps. I guess I foolishly thought it belonged to the reloading area. I know for me there are areas that I do not even cruise because they do not interest me. Was looking for All experienced info, not opinions.

I won't do it again.

quote:

Originally posted by jeffeosso:
this is called cross posting ... please don't do this

your questions are answered in big bores

I just came from Big Bores and not a single answer to this question!

quote:

I just came from Big Bores and not a single answer to this question

You are 100% correct. I had read all three posted. After Jeffe comment my swiss cheese memory put them closer together in content.

While I don't have experience with the actual measurement of velocity changes between 22&24 with the 375. Comparing other cartridges in which I took the same barrels and cut them back measured differences match real darn close to QL forcasts.

Someone stated that the muzzle blast might be excessive.

Anybody experience this with a shortened barre?

quote:

Originally posted by Rae59:
Jeffeosso, I can't tell if you are joking or not but I promise I won't ever cross-post, cross-dress, cross-my-eyes, whatever again......until tomorrow! ....

Yeee-ouch! Now you "may be" stomping on jeffe's feet.

There is a Rumor going around - that it is actually best to "cross-dress" if you are such a woosie that you need a Lead Sled to shoot a rifle. That way when the laughter begins at the Range, they do not know if it is because of their dress or because they have to use a Lead Sled.

quote:

Someone stated that the muzzle blast might be excessive.

Rae,

I've burned alot of H-4350 & VVN-160 with the 300 gr. Hornady's in my stubby 20" Winchester.

Even in the evening at the range I've never noticed excessive muzzle flash nor blast.

When I'm hunting - couldn't really tell you about muzzle flash & blast 'cause somehow I'm totally focussed on what's being shot. The recoil, blast, flash etc. seems to go unnoticed.

Still waiting for the first shred of proof of those many THOUSAND of deers you've culled, Hot core .. Really, man, you are the guy that said MANY THOUSAND .. i still get a chuckle from the idiocy of that statement .. its nearly as lackwit as someone that's never FIRED a bigbore giving advice on them


h335 will reduce mozzle blast, as its faster than norm for a 375

Okay now it has officially stooped to a pissing contest

quote:

Okay now it has officially stooped to a pissing contest

Yep that is a fact.

quote:

Originally posted by jeffeosso:
Still waiting for the first shred of proof of those many THOUSAND of deers you've culled, Hot core .. Really, man, you are the guy that said MANY THOUSAND .. i still get a chuckle from the idiocy of that statement .. its nearly as lackwit as someone that's never FIRED a bigbore giving advice on them

And jeffe is giving advice on proper Board etiquette?!?!!?

Here is your evidence - I Killed them.

And I've shot plenty of Big Bores, just find them and the people who "brag" a lot about them to be either Liers, Blow-Hards, Boring-fools, but generally all the above. Certainly not such a whimp that I'd ever need a Lead Sled.
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Hey Snellstrom and RamRod, I think you both are correct. jeffe