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More on my Wildcat bullet testing.

 
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  #1  
Old 02-13-2006, 09:17 PM
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More on my Wildcat bullet testing.

Well last week we came back with 100 yard shots with some 169.5 grain Wildcat ULD RBBt and FB bullets. This week we have a 300 yard group of each and the results were surprising.

I'll admit that I should have fired a few groups of each but we were also planning on doing some ATV and motorcycle riding so I only fired one group of each bullet then we packed up and went to get muddy.

Last week the neater looking group at 100 yards were the flat base bullets and the longer group were the RBBTs. This week it was the opposite. Way opposite! Here is the 3 shot group of the RBBTs that measures just under one inch. The light wind may have had something todo with the horizontal shape. But I'll take 1/3 MOA at 300 every day of the week.


But then I fired the FBs and I have no idea what happened. Is this what is meant by "sometimes a gun just wont like a certian bullet"? And I noticed the third shot went "flyer" to the right and #4 came back toward the group (way back this time).


Kirby, I would especially like your input here if you would. Is it acceptable that two almost identical loads and bullets would do something like this?

If anyone else has a comment please jump in. At this point I am ready to go full bore working on a load for the RBBTs and say "so long" to the FBs.
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Old 02-13-2006, 11:13 PM
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Re: More on my Wildcat bullet testing.

[ QUOTE ]

But I'll take 1/3 MOA at 300 every day of the week.
<font color="blue">Looks to me to be a bit under 1/3 MOA </font>

At this point I am ready to go full bore working on a load for the RBBTs and say "so long" to the FBs.

<font color="blue">I'd do the same thing, for cosmetic reasons only, though. Looking at a FB bullet is like looking at Marlyn Monroe with out any legs! [img]/ubbthreads/images/graemlins/blush.gif[/img]:o </font>


[/ QUOTE ]

Regarding the flat base shooting different this week? Its just like Meichele says above in his sig: "Because any other sport just would not be frustrating enough!!"
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Old 02-14-2006, 06:46 AM
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Re: More on my Wildcat bullet testing.

If you go back to your earlier post showing the initial 100 yd targets with each of these bullets you will find an interesting pattern with the flat base bullets. The bullets move to the right for three shots and then the fourth shot is back to the left.

You do not show the sequence of shoots for the RBBT so it is not clear if it has the same apattern.
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Old 02-14-2006, 09:37 AM
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Re: More on my Wildcat bullet testing.

Question is, How does the gun know which shot is third of the FB since I fired the RBBTs and then the FBs as though they were one string? Maybe there was a little more cooling between the two types but the gun never moved from the bench.
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Old 02-14-2006, 10:54 AM
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Re: More on my Wildcat bullet testing.

Thats some good shooting with the rbbt's at 300 yards. I was not surprised to see a 1 inch group at 300 yards. I experienced the same thing with the 125g rbbt out of my stock winchester 25-06. Absolutely the most accurate bullet I have shot out of it. I am anxious to get a 300 or 300/338 RUM built and try the 225g rbbt, or the 300g rbbt and see what happens. When you can get 1 inch groups at 300 with factory rifles, just goes to show how accurate factory rifles can be, with great bullets as well.
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Old 02-14-2006, 04:14 PM
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Re: More on my Wildcat bullet testing.

Well,

Could be something as simple as your rifle just preferring the ULD RBBTs at longer ranges. This is THE reason why it is much better to test loads at longer ranges. At 100 yards, most loads look very good in a quality rifle. At farther ranges the personality of the loads and the rifles bullet preference come into play.

Getting a bit more involved, you say there was a slight crosswind. Remember the ULD RBBT will have a significantly higher BC value then the flat base bullet. This means it will buck the wind a bit better or should I say be less effected by the wind compared to the FB bullet.

Is this the reason you are seeing 1" groups with the ULD RBBT and are printing +5" groups, I doubt it.

More then likely this would be my opinion from looking at the targets, shoot more groups.....

One good group and one bad group means very little for determining a good load from a great load or even a bad load.

We have all pulled a shot here and there even if we hate to admit it. You take that third shot off the FB group and it looks alot better!! If by chance you saw that third shot fly and got a bit jumpy on the fourth shot as well, the group will go south quick. Rememeber your first two shots went into 3/4".

My advice, take an average of say five three shot groups and see which one performs best. You can get an idea that a load is a good one with one group but to prove its a good or bad load will take much more then one group, at least for me it does,

Both groups are noticably horizontal in shape. Any stock issues here contacting the barrel? Barrel heat can do some strange things, as can very slight barrel contact.

One other thing, are these two bullets made off the same jacket? If they are then you should not have any problems shooting them without cleaning in between. If they are different then you should always clean before testing another bullet.

I suspect that they are the same jacket but just checking.

All in all, do some more shooting. If you get an average of five three shot groups or whatever you want to shoot, you will have a much more meaningful idea of what the load will or won't do.

Good luck, keep us posted.

Kirby Allen(50)
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Old 02-14-2006, 07:48 PM
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Re: More on my Wildcat bullet testing.

[ QUOTE ]
Thats some good shooting with the rbbt's at 300 yards.

[/ QUOTE ]
Thanks. It has me very excited. [img]/ubbthreads/images/graemlins/cool.gif[/img]
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