Hammer Bullets compressing my powder charge.

[Tech4]

First thing I would do is measure where your bullet contacts the lands in your rifle using a Hornady OAL tool and a modified case. Then measure your magazine for max COAL that it will hold. If your magazine allows you to load long enough to hit the lands in your rifle then then start with around .020" jump. If your magazine doesn't allow you to reach the lands then load to max magazine length that still allows proper feeding and function of the loaded round. Then work on powder charge

I have one and I did that.

 

[Tech4]

From the Vihtavuori site that's a little more powder than is listed for either a 140, or 150 grain bullet. Which in itself may or may not be an issue.

What is the source of your load, and have you worked up to this level.

Hornady tenth edition

 

[Tech4]

If you have not loaded this combination of powder and bullet you have no way of knowing if N165 is the best for this bullet.

If max OAL is 2.77 why are you not seating at 2.77?

Have you measured you magazine max length and your ogive length to see when this bullet touches your lands?

The way you have your first post worded scares me that you might be putting yourself in danger of over pressurizing a round.

What 270?

That is why I stopped a asked for help.

 

[Tech4]

Tech4,
Contact Hammer directly before going any further. They will not steer you wrong.

I didn't see any phone # on his website.

 

[Sykes]

 

[19 Badger]

Top of the page on their website along with email adress....

 

[dirthead1]

Why can't you use a lighter bullet?

Generally with solid copper bullets, you go with a lighter bullet. They don't shed weight on impact like a lead core bullet. They also have less density, so a similar weight solid will be longer than a lead core bullet.

 

[Tech4]

Why can't you use a lighter bullet?

Generally with solid copper bullets, you go with a lighter bullet. They don't shed weight on impact like a lead core bullet. They also have less density, so a similar weight solid will be longer than a lead core bullet.

I would bu my 1.10 twist rate doesn't let me do that.

 

[adam32]

Start with minimum powder charge for an equivalent Barnes bullet, load to SAAMI OAL length and work up till you see pressure signs.

Never ever start at a max load for another bullet when using a new bullet!!!!!

 

[adam32]

I would bu my 1.10 twist rate doesn't let me do that.

Yes, you can most certainly shoot a lighter bullet with a 1/10 twist...heavier bullets is when you would have an issue.

 

[dirthead1]

I would bu my 1.10 twist rate doesn't let me do that.

The .277 117 grain shock hammer is listed at 1-10" or faster. Your twist is not limiting you using a lighter bullet.

 

[Tech4]

The .277 117 grain shock hammer is listed at 1-10" or faster. Your twist is not limiting you using a lighter bullet.

I just looked an you are correct that will likely fix my problem.

 

[Wedgy]

Stick with the 140 and use a faster burning powder, it will take up less room in the case

 

[mtank]

I would bu my 1.10 twist rate doesn't let me do that.

I would call them tomorrow & talk to them. I called them about a month ago about my 264 win. He suggested a Bullet to try as well as powder & what grain to start with.