H4198 in a 30x47 HBR ?

S

sambubba1

Guest
What do you guys think the powder charge range would be for this 30x47 based on Lapua .308 and 6.5x47 cases using 125g ballistic tips?
I shot one load yesterday that left the bolt very hard to open with an ejector mark on the case. The load I used was from a well known
BR shooter--38.5g. Any help will be appreciated. I normally use Varget and H4895, but some of the guys were touting H4198.
 
H-4198 is

sambubba1 said:
What do you guys think the powder charge range would be for this 30x47 based on Lapua .308 and 6.5x47 cases using 125g ballistic tips?
I shot one load yesterday that left the bolt very hard to open with an ejector mark on the case. The load I used was from a well known
BR shooter--38.5g. Any help will be appreciated. I normally use Varget and H4895, but some of the guys were touting H4198.
Click to expand...

WAY too fast for a max density load for a 30x47. I for one would not use a low density load in a BR rifle. You really want to use a powder that yields a 95-105% load density for true consistency. If you are looking for something faster than N-135 or 748, try N-133 or Benchmark. As for your first trial OF 4198, you are WAY over-loaded
 
Dick Grosbier said:
I have shot 40.7 Gr. to 41.2 Gr. very successfully with 112 & 118 Bibs in my two 30x47L rifles.
Click to expand...

This is why I was incredulous that my load left a big ejector mark and the bolt was very hard to open. I wonder if the ballistic tip
might have caused the problem.
 
sambubba1 said:
This is why I was incredulous that my load left a big ejector mark and the bolt was very hard to open. I wonder if the ballistic tip
might have caused the problem.
Click to expand...

Actually this is what I hate about talking powder charges on the internet, there are literally a whole lot of variables here. For openers the lot of H4198 I have right now is quite slow compared to some I have had. Still I would think the load you quoted would not give pressure problems.
 
twist?

sambubba1 said:
What do you guys think the powder charge range would be for this 30x47 based on Lapua .308 and 6.5x47 cases using 125g ballistic tips?
I shot one load yesterday that left the bolt very hard to open with an ejector mark on the case. The load I used was from a well known
BR shooter--38.5g. Any help will be appreciated. I normally use Varget and H4895, but some of the guys were touting H4198.
Click to expand...

and what twist?
 
The facts are...

Your load is too hot, so back off or seek a slower powder that will give you more density as Dave halblom suggested. Different chambers will respond to the same load differently. Don't ignore the warning signs your rifle is flashing.
 
I would not consider that way overloaded. My 30-30 will digest similar loads without pressure problems, and bolt lift is normal. That exact load would run around 3200 fps in the 30-30. The 30X47 holds a little more powder, so the pressure should be less. Bottom line is this. If your bolt effort is hard, there can be other reasons like a tight barrel, hot lot of 4198, or chamber to bolt misalignment or not square.

Michael
 
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