6mmBR and recoil..

N

Northman

Guest
How light can you make a 6mmBR ( shooting 70-75grains bullets), and still be able to see impact through your scope, using a bipod or sitting at a bench?

I dont want a muzzle break..
 
I can't answer your specific question but the answer will depend to some extent on what bullet weight you are shooting. 55g bullets will have less recoil than 107g bullets.

I have a 7 lb .223 that has killed a lot of ground hogs shooting 40g Nosler Ballistic Tips and I've seen the impact on most of them (that bullet;'s terminal performance on ground hogs is excellent), same is true shooting 20g V-Max bullets out of my .17 Remington in a 700BDL (no idea how much it weighs). I've shot a few with 55g NBT out of my 10 lb .243 and seen a few impacts (at longer ranges).

I see them all with my .22 Hornet and .17 HMR.

Fitch
 
welllll...ther are a lot ov variables.....besides wt. (wich I dont hav any under 10 lbs)...the shape/desighn/drop at heel of the stock ---field of view on the scope--and how firm/tite of hold you use (no free recoil)....I usually dont see much till I get past 300 yds...just hear the "thud" in close.....not trying to be vague,,,,it is a complex set of paramaters.....with a BR you wont miss very many of em,,wink,,,Roger
 
I haven't weighed my 6 BR, but it's likely 10 lb or so with scope and bipod. On prairie dogs out at 200 yards it'll likely provide a view of the action. I'm using lighter bullets, 55 to 65 gr, though since sod poodles don't require a whole lot of killing and out to as far as I can see the critters anymore the light bullets hold up as well as heavier slower bullets.

A lot depends on your scope too. The higher the power the smaller the field of view. Even with my fading eyesight I find that 18-20X works well enough. Everything's a tradeoff, field of view, how much power you need to see the target, and mirage - the higher the magnification the more it's visible and a problem.
 
With my 25BR & 42X Nightforce I can see the 87 gr bullet, or the bullets trace, in flight before it hits the target (With a light background) Rifle is 12.5# with a muzzle brake. Muzzle blast blanks the view out to 200 yards.
 
I changed my bipod recently to a V8 Atlas instead of a Harris and by god it is good.

There is no hop after the shot and I see hits time and time again.

Has anybody else tried it ?

I am selling all my Harris bipods ..............
 
Ballistics Calculator

The JBM Website has changed but the calculators are a gold mine. It doesn't answer your question but can help you get there. Recoil can be estimated and compared with what people experience or see. You require real world experience, the hardest to accurately get. For example, if we secure Octopus' charge weight data, then we can know what equation results in recoil with a visible bullet trail. He shoots a 25 BR though. Does that make sense ??

Here is the site: http://www.jbmballistics.com/ballistics/calculators/calculators.shtml

Here is the Link for calculating recoil:
http://www.jbmballistics.com/cgi-bin/jbmrecoil-5.1.cgi
 
When I was watching the bullets @ 300 yards I was shooting 87 gr Berger w moly over 34 grains of RL-12. M.V. was 3,220 fps. Rifle is about 13#. There is a muzzle brake on the barrel. Stock is an "Edge". Scope is 8.5X25X50 Leupold set on 25 power. This set up has very light recoil. Similar to, or less, than a 222 of equal weight.

I have not been able to see the bullet in flight @ 100 or 200 yards. I suspect this is due to the muzzle flash.

Key to seeing the bullet before impact seems to be a very good scope and very little recoil. I have seen the bullet trace when shooting longer ranges, 400+, when conditions were right.

Usually I have no problem seeing the bullet impact at 300 and longer ranges with this rifle.

Octopus
 
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