Thread: Snubby load?
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Old November 30, 2012, 06:15 AM   #70
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Join Date: October 9, 1998
Location: Ohio USA
Posts: 7,882
Do the 158gr SWC JHP generally have less recoil then other types?
Do you mean 158 gr SWC and 158 gr JHP?

As far as I know, there is no such beast as a semi wadcutter jacketed hollow point (SWC JHP).
There does exist however a semi wadcutter hollow point SWCHP.
A semi wadcutter (SWC) is a lead bullet with no jacket.
One of the most popular is what's commonly called the FBI load - a 158 gr lead semi wadcutter hollow point loaded to ~ 10% over SAAMI .38spl pressures. You'll see it abbreviated as a +P 158 gr LSWCHP.

Anyhow - recoil is a result of the bullet's velocity - for every action there's an equal reaction - more than bullet weight.
A slow stepping 158 gr bullet, regardless of it's configuration, will have less felt recoil than a fast stepping 125 gr bullet.

Push both at the same velocity though and, the heavier bullet with more mass is going to have more felt recoil.

However - that's only the tip of the iceberg.

Generally, a slower burning powder is used for a heavier bullet and a faster buring powder is used for a lighter bullet - not always, but, generallly.
A slower burning powder will have more of a "push" than a "snap" since it accelerates the bullet slower.

Steve is correct. The wadcutter has a poor ballistic coefficient (BC).
Think of the BC as "streamlined". A sports car is more streamlined than a sedan.- while it's not the same thing - it's the best way to get the idea across in the least amount of typing. Whole volumes have been written on BC.
Another advantage the SWC has over the WC is that the "point" helps guide the bullet into the chamber allowing for faster more positive reloads.
WC's are nearly impossible to use with a speedloader.
SWC's are worlds better - but - because of the sharp shoulder on the bullet, they can also hang up.

The SWC profile is generally preferred over the WC for those reasons.
It offers some of the advantages of the WC and some of the BC advantages of the round nose lead bullet.

An extremely good source of this type of information is the Lyman reloading manual and the Speer reloading manual. There's a wealth of information in them beyond just listing recipies.
That's one of the big reasons I push so hard for new shooters to get into reloading ASAP.
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