Should be possible shouldn't it? Cant find an online calculator or formula. Any thoughts?
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Should be possible shouldn't it? Cant find an online calculator or formula. Any thoughts?
Conservation of momentum. Momentum of projectile leaving barrel = momentum of rifle recoiling. Momentum = mass(kg) x velocity (m/s)
Here is a recoil calculator
https://shooterscalculator.com/recoil-calculator.php
For all of those calculations, I need information on powder charge which I don't have (factory rounds).
You are still going to need powder weight because that is also being “thrown” down the barrel. Muzzle energy will only be energy of the projectile and won’t take into account the energy of the powder.
In the big scheme of things I gotta ask......why ? What does it matter ? Genuine question no hate :thumbsup:
Just estimate the weight of the powder, you wont be far off . ...
Centrefire ammunition that my young son can use.Quote:
Originally Posted by dannyb
There was an interesting article in Handloader magazine on using powder weight and bullet weight to reduce recoil,Its called ejecta weight and makes quite a effect on recoil.suppressors also add weight to gun mass.
Generally lower projectile weight = lower recoil.
Do you have a pre determined energy level as a cut off ? Otherwise just go light for caliber and limit range, I was shooting 125gn accubonds in my 308win and it was very light recoil but still a solid performer :thumbsup:Quote:
Originally Posted by MB
Just weighing up options. I was interested to see that "lite" .308 rounds have less muzzle energy than standard .243 ammunition. Wondered how that translated to recoil.Quote:
Originally Posted by dannyb
the 130grn speer hp or the 125grn NBT are both solid preformers at reduced velocity...we used both in the 7.62x39mm for deer at bush ranges and wallabies as far as we could hit them.
you have two main options...light projectile and mid velocity or soft heave projectile and mild velocity
strange thing...the winchester 180grn powerpoint loads have LESS recoil than the same 150grn loads and they kill well,I couldnt get same projectiles so went with round nose hornady in 180 grn and had no complaints at all.good soft projectile that opened up fast.
you can basically turn your .308 into a 30/30 or 7.62x39mm preformance wise.....as long as you arent trying to stretch barrel you will be fine...suppressors make a huge difference for little people.
There’s a recoil calculator in quickload. Just need to know rifle weight and load details. Failing that projectile and muzzle velocity or muzzle energy should allow a pretty close estimate.
300blk 135 supersonic have very little recoilQuote:
Originally Posted by MB
Make sure the speed the bullets are going once slowed down are still within their projectile performance range so they still expand
165 ballistic tips won’t expand even with bone contact at 1000fps
https://uploads.tapatalk-cdn.com/202...b2a2d65f54.jpg
The subs don’t seem to do much even with a close range heart shot surprisingly but pigs are gonna pig and just keep running
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@MB There is probably someone on here that has already worked up a low recoil load for the caliber your shooting and maybe with luck for the same type of rifle.
Suggest providing those details and you would get some good starting points. I have a good one for .303
40g 2206h with 150g projectiles or better 30-30 projectiles if they will feed reliably in your gun ( wouldn’t in mine sadly)are my go to for my 10yr old,16in barrel and suppressed .308
Very similar recoil wise to my old 7.62x39
if its 30 cal a load with roberts 151 hollow points at around 1800 I hear work great
Gordons reloading tool shows recoil for each load.
I should be able to figure it out on grt playing with the powder charge to match your velocity . Have you chronied said factory ammo ? I’d need velocity, projectile, weight of rifle and cartridgeQuote:
Originally Posted by MB
I've settled on 300BLK FTX 135gr supersonic and the tissue damage is shocking (in a good way!).Quote:
Originally Posted by Bill999
Just working off published data for factory rounds at the moment.Quote:
Originally Posted by Kelton
Cool as il punch it in as 2085fps as that’s what my ballistic app has that factory offering at and let you noQuote:
Originally Posted by MB
awesome Ill be keen to see how you get on with them, I have a few handfuls of the buffalo river 135 supers and they zeroed for 150 with my 30m subx zero which is super convenientQuote:
Originally Posted by MB
I've posted this picture a few times before. This was the first time I used them. Big bloody holes (or bloody big holes, either way!), albeit at short range.Quote:
Originally Posted by Bill999
https://i.ibb.co/Nx1C90f/Hunt10.jpg
surprising to hear that, iv shot quite a few peacocks with them and it worked well so I am keen to give them a go on something bigger
If I can shoot to 200m with my 300blk it basically makes all my other rifles not necessary so id better be careful not to do that haha
Quote:
Originally Posted by Bill999
Yes, it also might mean that I don't need to buy another rifle! 732 ft.lb energy at 200 yards (Hornady data). Not the 1000 ft.lb that our American friends consider necessary for a clean kill and I wouldn't go chasing big reds or sambar with it, but for most other things...
That calculator works well enough to compare recoil of different loads.Quote:
Originally Posted by stug
Here's a comparison i did with my M7 6.5CM with full power 140gr eldm loads compared to my 123gr reduced recoil youth loads for my 8 year old.
Damn stupid forum wont let me add the 2nd image.
But the 123 gr numbers are:
123gr
2600 fps
30gr Powder
8 Lbs rifle weight
Recoil impulse 2.09 lbs.sec
Recoil Vel 8.39 fps
Recoil Energy 8.75 ft.lbs
A big reduction in felt recoil
For those interested in the difference in the terminal performance of the two loads:Quote:
Originally Posted by GWH
140gr eldm at 2850 fps holds 1,000 ft lbs and 1800 fps to 720 yards
123gr eldm at 2600 fps holds 1000 ft lbs and 1912 fps to 420 yards, still well enough for most hunting situations for most people and well enough for most shots inside 300 yards that my 8 year old would be taking.
Out of interest if i was to use a 100gr Nosler ballistic tip in place of the 123 gr eldm for the light youth load, to get the same level of energy at 420 yards, as i get with the 123 gr, id have to push the 100gr at around 3250 fps.
So when looking at doing this stuff and trying to maximise effective distance (even when using a lower velocity youth load), it really helps to use a bullet that still has a reasonable BC.
Hah ignore that mate and keep in mind what sub 22lr and put the bullet where it will break something important and things will go down fineQuote:
Originally Posted by MB
My 10-22 still kills more than anything else in my gun cabinet but 300blk is just easier
https://uploads.tapatalk-cdn.com/202...1aafbec238.jpg
Subx done the business this week
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And bear in mind the insane velocity of the gases as they exit the barrel.Quote:
Originally Posted by stug
There is a formula in one of my old Lyman reloading manuals which works well. You may be able to find it online. If not, let me know and I can probably find and photograph it @MB