A7 outing with H1000 ,300WM , it's a start.

Kelly Timoffee said:
Just for those suggesting a drop tube.

How much of a gain do you actually expect?

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Is dark out and I am in my reloading room. So I did a small experiment. Using federal brass. I kept adding powder untill I could hear and feel a slight crunch.
One with the drop tube and one without. Not overly scientific but I could get on average 2.6gr more powder with the 4" drop tube. Using the same bullet and 4831.
 
Ruger007 said:
Is dark out and I am in my reloading room. So I did a small experiment. Using federal brass. I kept adding powder untill I could hear and feel a slight crunch.
One with the drop tube and one without. Not overly scientific but I could get on average 2.6gr more powder with the 4" drop tube. Using the same bullet and 4831.
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How about vs taping the case several times on bench, that is my method currently.
 
Kelly Timoffee said:
Well, I'll carve up the action and magazine and feed ramp then weld on 2" to the end of the barrel. :)

I am however very curious how accuracy and velocity are lost from seating depth variances in your opinion?

And yes, I do know seating depth does effect case pressure.
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I believe there have been discussions on seating depth and pressure curves before and the affect on accuracy.

Seating bullets into the lands will increase the initial pressure spike, but with a significantly reduced pressure curve.

Depending on the rifles and types of match, some bench rest shooters, whose rifles have very tight chambers, with tight necks and especially tight throats, will purposely load their bullets to seat into the lands and when the bolt cams closed, maybe even set the bullet back a few thou into the case. This practice wouldn't be safe with the generous chambers of most hunting rifles.

IMHO, if the rifle has a tight throat, freebore isn't an issue as far as accuracy is concerned. It may however, reduce velocity a bit, while keeping pressures down.

I have two rifles that have enough freebore to allow shooting long for caliber bullets. One is in 6.5x55(T3) and the other is for 7x57(98 Mauser). Both of these rifles are very accurate with bullets as light as 97 grains in the 6.5 and 120 grains in the 7 as well as with long heavy bullets in both.

These rifles both have tight chambers and tight throats.

The cartridges are both over 125 years old and share a lot of similarities in design.

The design of the day took the early smokeless powders, with dubious quality control and the exposed lead core, jacketed bullets into consideration.

Today, both of these cartridges are still well respected, even though they are seldom loaded to their real potential.

There's a very good reason for this. They work very well. One of the reasons they work very well is the length of their necks.

If the cartridge is loaded straight to the axis of its center and the chamber is cut straight to the axis of the bore the rifle should shoot well if all else is OK.

The issue now is the chamber and whether it's been cut to the minimum side of spec or to the maximum side of spec. With an off the shelf rifle, it's a crap shoot.

This is where the longer necks come in. If your chamber is on the large side, which is the case with most commercial grade rifles, the cartridge can and does tilt very slightly in the chamber.

If the throat is tight, the bullet will align itself with the bore without any help. If the throat is large, the bullet will need the base supported by the neck, until it reaches the lands, so that it enters them true.

Long, sloppy throats tend to aid inaccuracy IMHO as well as allow blow by of ignition gasses and the list of issues goes on from there.
 
Kelly Timoffee said:
That's my main issue ,3.340" is about as far out as I can go.
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In a hunting situation the magazine length of 3.34" should not be a determent.

Make sure the loaded round is concentric , as close to zero run out as possible.

You have shown some good groups, take a couple of the best and stretch the distance to 3-500m, to see if they hold up.
 
I was out with the 300 today. Same 190gr ABLR 3.340 depth.
82gr Ramshot Magnum. 3117 avg of 5 shots. 1" group. I would say this is a stout load. But should fit in you case easily. I could shake the loaded case and hear the powder. I have loaded up to 85grs. But I think 82 is about max in the comfort and accuracy area.
 
Ruger007 said:
I was out with the 300 today. Same 190gr ABLR 3.340 depth.
82gr Ramshot Magnum. 3117 avg of 5 shots. 1" group. I would say this is a stout load. But should fit in you case easily. I could shake the loaded case and hear the powder. I have loaded up to 85grs. But I think 82 is about max in the comfort and accuracy area.
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Not an easily available powder I don’t think is it ? Must be an extremely dense kernel.

I now am doubting I’ll get any more out of the RL22 than I am with my other powders to be honest.
 
I got it from Budget shooters. Came quick and shipping is cheap.

Very dense ball powder.

Just looked. Seems to be sold out. Ask him, maybe he is getting more.
 
82grs Ramshot Magnum is 104% load density. Stiff load, I would definitely work up to that charge. I shoot 77grs Ramshot Magnum under a 190gr in my 300wm for around 2900 fps 26"
 
hawk-i said:
Ramshot is not a magic powder, it falls right in between H1000 and Retumbo for burn rate.
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I'm kind of thinking this as well, with the powder I have on hand I don't really need to have 102 choices.

The RL 22 will be the last powder I try then I will get into fine tuning and subtleties of the cartridge.
 
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