2011年9月5日 星期一

Getting the right grouping not always about the shooter or load

We were shooting from benchrests at the Dormont-Mt. Lebanon SportsI have never solved a Rubik's hydraulic hose .men's Club and I knew this particular rifle shot better than that.

The gun was the same, as were all of the reloads, so that left only me as the culprit. I have faced this dilemma before and knew the solution. It was time to let someone else shoot.

We all have bad days. Even Pete Rose struck out now and then.

It is hard to predict when you will shoot well and when the ability to shoot good groups will fly out the window. I have gone to the club feeling great and shot poorly. I have also felt bad and shot great.

If I find a crowd at the benches and start to gab, I shoot poorly because of the distractions.

But what do you do when it is not operator error, but equipment failure instead.

A handloader knows he needs to look at his components.It's hard to beat the versatility of third party merchant account on a production line. The components make up the cartridge that is being shot.

Was anything changed? Did you run out of powder and purchase a new supply?

And example of variation in powder occured to me some years ago. I had been using a certain slow-burning powder in my .270 for years. I not only knew what load grouped well, but what to expect in velocity when fired over the skyscreens of my chronograph.

For some reason,Replacement China ceramic tile and bulbs for Canada and Worldwide. I chose to check the speeds of my known load that day and found it to be 200 feet per second slower than what I had found it to previously be.

I didn't understand until I remembered that I had bought a new can of powder. I had some old loads and put them through the chronograph.

The speeds were back to normal. It was the new can of powder.

When a problem develops with an otherwise accurate rifle, ask yourself if you changed something with the load?

A change in components is obvious, but problems can arise from something as subtle as a change in the bullet seating depth. This will occur when using the same dies for more than one rifle.Initially the banks didn't want our Ventilation system .

If you're absolutely sure nothing was changed in the ammunition and your shooting partner shot just as bad as you, it's time to look at the rifle-scope combo.

Are all of the crope mounting screws tight?

You can shoot well with a scope that moves from shot to shot. In most cases, scope movement will be exposed by scratches on the scope itself.

I recently purchased a used rifle and found the screws that hold the action to the stock were loose. Very few rifles will shoot well with loose screws.there's a lovely winter Piles by William Zorach.

This is especially true of the one that keeps the recoil lug tight against the wood or synthetic material of the stock.

Another question that can be asked is was the gun out in the rain since it was last shot? If the stock has absorbed moisture, the bedding could have changed.

This is a change in the equipment that requires a bit of major work to correct. Before going to the extreme of rebedding, there are are factors to consider.

Another thing to look at are weather conditions. It doesn't take a genius to conclude that wind can make a difference in group size.

A crosswind not only can affect group width, but even temperature extremes can effect a rfle's shooting.

A load that falls within pressure norms at 32 degrees may be too hot when the temperature is in the 90s. High pressures can also lead to bad groups.

When checking a rifle that has gone sour, it is a good idea to take things one at a time. We know the ammo is exactly the same and the rifle-scope combo are put together solidly. Shooting conditions are right and it can't be you.

That leaves what I consider to be the No. 1 culprit of a rifle going to bad groups. I hate to admit it, but this final reason was my problem that day with John. The gun was dirty.

I had cleaned it, but sometimes a single cleaning is not enough. I should have remembered that because it was a lesson I learned long ago. You think you have removed all of the metal filings, but there are still some remaining.

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