I switched loads for my .375HH and have small groups under and inch, but they are vertical. The bedding in the rifle is fine, any suggestions.

Hey friend.....if they're under an inch I'd care less if they was vertical or which ever way they was.....

Take it and run!!!

quote:

Originally posted by safari:
I ...have small groups under and inch, but they are vertical. ... any suggestions.

Once you are at that accuracy level, it takes things that most folks don't like to hear about.

Lots of "Practice" while focusing on what you are doing will probably eliminate the issue. Just a minute difference in Bench "Position" can cause that easily with a rifle with that amount of recoil.

If you were shooting a small 22-30cal rifle, I'd recommend shooting between heartbeats. Of course, that requires a relatively slow heartbeat which you might already have. If your normal rested heartbeat is 50 or below, it can be done easily, 50-60 takes much more focus and above 60 you are "Yanking" the trigger. Plus the rifle doesn't have time to settle before the next Beat when the Beats are fast.

Speaking of Triggers, you do not want a "Light" trigger on a 375H&H, but it should make a Crisp and Clean release. As long as Crisp and Clean is there, the weight should not be a huge concern and should be in the 5#-8# range.

You didn't mention the Power of the Scope, but if you are shooting a small power scope on it, then that can also be the answer. It is impossible to shoot a small power scope as accurately as a higher power scope. But a high power scope doesn't make a lot of sense on a 375H&H when you consider the Game it is normally intended for.

Extend the range on out and the ability to see the variation "improve" as you Practice will be enhanced.

If they are under an inch, I don't see how much vertical can be involved.

Normally when I get dramatic vertical stringing I feel it's due to too low of a powder charge. ie the bullet isn't moving fast enough.

I don't think you have a problem.

If you are using a sandbag under the butt, just the smallest difference in pressure will cause it as will holding it tighter or looser into the front bag from the last shots. Recoil always changes the firmness of the bags from shot to shot. Then we all snuggle the gun into the bags to get back in the bull.
Under 1"? I don't think you can improve the way you hold the gun because you are already way ahead of the game. Chalk it up to being human and still breathing.

if u didn't have a heart beat or didn't breathe, you'd be fine..personally, i' rather keep my heart beat and breathing and take a 1 inch vertical string

Here's an example of horizontal stringing but I'm not worried about it.

RIGHT ON!

Any of these shooting techniques should end the vertical stringing:







Of course, a good shooting coach is always helpful:

the guy on the the right, with the cool white slippers and blue pants, just had a muzzle brake go off in his EAR

note the look of approval and understanding for his (ex) friend's shooting style.



vertical stringing in a 1" group is caused by shooter eye focus, not loads

------
had a friend come back from Iraq, where apparently they think we have iraqi seeking bullets... they say that they can fire an entire mag and might hit 1 american ....

the americans (who the iraqis say shoot --like women)... aim and fire 5 times, and 4 iraqis are cooling and 1 is wounded...

hench, since americans "shoot like women" the iraqis feel it must be seeker bullets.....


and this little interview came from guys being trained to be the police force over there

jeffe

Vertical stringing usually means that the cartridge wants more powder. Start working up slowly.

quote:

Originally posted by safari:
I switched loads for my .375HH and have small groups under and inch, but they are vertical. The bedding in the rifle is fine, any suggestions.

Right! If a group is under an inch, it can't be VERY vertical!! I would hardly call it STRINGING!!!

Rotate the target 45° before shooting.

One thought and it could be a factor the could come into play is that are you shooting from a bench rest or sand bags and if so,are you setting them up on the barrel or the stock? If something is touching your barrel this can effect your groups. van

Hey Jeffeosso THAT was FUNNY thank you

quote:

Originally posted by safari:
I switched loads for my .375HH and have small groups under and inch, but they are vertical. The bedding in the rifle is fine, any suggestions.

If it isn't the result of your rest or your jiggling up the propellent charge a little or switch to a hotter primer... unless of course you are already using Federal-215's.

AllanD

Have ya got sling swivels gouging into your bags(front or rear)that is causing upward movement? It don't take a whole helluva lot to cause stringing. I always remove mine when shooting off bags. Jim

The guy in the pink clam diggers with the yellow radio is the RTO. The deaf guy is the 2nd lieutenant.

quote:

Originally posted by lawndart:

The guy in the pink clam diggers with the yellow radio is the RTO. The deaf guy is the 2nd lieutenant.

2nd lewie!!! with nor sargent around, no wonder he's now deaf!!

jeffe

Lots of possible causes listed above but one of the most obvious is missing . Basically the muzzle moves in an elliptical or perhaps figure 8 pattern when the rifle is fired . In order to achieve best accuracy you need to adjust your load to find the point at which the muzzle is stationary and about to change direction eg. from up to down or vice versa .
Only way to do this is trial and error . Suggest you make up 3 rounds of each load at about .5 gn increments working up from 10% below maximum (smaller increments for smaller cases). Fire them off . Pick those groups which show minimal vertical dispersion and load up 5 rounds with the same powder charge and try again .
Horizontal dispersion is usually caused by shooter error or a rifle problem . Fine tuning of seating depth after the above process will give you your most accurate loads .'
If your rifle shoots consistently sub MOA with the bullet and powder you are using now then the above process should give you a good group .